Prenatal Care (Clinical)

Initial Prenatal Visit

Practice guidelines may vary depending on location. The information provided here is based on US, WHO, and UK guidelines.

Objectives^[1,4,15]

The initial prenatal visit is often the most important. Objectives of this visit include:

• Pregnancy confirmation Pregnancy Confirmation Prenatal Care 
• Establishing the gestational age Establishing The Gestational Age Prenatal Care and estimated due date Estimated Due Date Prenatal Care ( EDD EDD Pregnancy: Diagnosis, Physiology, and Care)
• A comprehensive medical history and physical exam
• Routine laboratory assessments
• Counseling^[1,4]
  • Expected course of the pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care
  • Worrisome signs and symptoms to report to the health care team
  • Safety during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care
• Determine the pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care risk and establish the follow-up schedule (based on risk):
  • Low-risk pregnancy Low-Risk Pregnancy Prenatal Care:
    • Every 4 weeks until 28 weeks’ gestational age Gestational age The age of the conceptus, beginning from the time of fertilization. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Pregnancy: Diagnosis, Physiology, and Care (wGA)
    • Every 2 weeks from 28 to 36 wGA
    • Weekly from 36 wGA to delivery
  • High-risk pregnancy High-Risk Pregnancy Prenatal Care:
    • Highly individualized
    • Visit frequency varies according to disease and response to treatment.

History and exam

Important areas to cover (and why they are important) include:

Obstetric history Obstetric History Prenatal Care:^[1,4]

• Gravidity Gravidity The number of pregnancies, complete or incomplete, experienced by a female. It is different from parity, which is the number of offspring borne. Pregnancy: Diagnosis, Physiology, and Care and parity Parity The number of offspring a female has borne. It is contrasted with gravidity, which refers to the number of pregnancies, regardless of outcome. Pregnancy: Diagnosis, Physiology, and Care
• Mode of deliveries:
  • E.g., vaginal or cesarean delivery Cesarean Delivery Cesarean delivery (CD) is the operative delivery of ≥ 1 infants through a surgical incision in the maternal abdomen and uterus. Cesarean deliveries may be indicated for a number of either maternal or fetal reasons, most commonly including fetal intolerance to labor, arrest of labor, a history of prior uterine surgery, fetal malpresentation, and placental abnormalities. Cesarean Delivery (CD)
  • Type of uterine incision during any CD:^[13]
    • Incisions involving the uterine fundus Fundus The superior portion of the body of the stomach above the level of the cardiac notch. Stomach: Anatomy, such as classical and T-incisions, carry an unacceptably high risk of rupture during labor. Repeat CD Repeat CD Extraction of the fetus by abdominal hysterotomy anytime following a previous cesarean. Cesarean Delivery prior to the onset of labor is recommended.
    • Low transverse uterine incision → may be candidate for a trial of labor after cesarean (TOLAC)
    • Individuals with > 2 uterine incisions should have a repeat CD Repeat CD Extraction of the fetus by abdominal hysterotomy anytime following a previous cesarean. Cesarean Delivery.
• Gestational age Gestational age The age of the conceptus, beginning from the time of fertilization. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Pregnancy: Diagnosis, Physiology, and Care at prior deliveries:
  • E.g., full-term or preterm delivery
  • History of a prior preterm delivery ↑ risk for preterm delivery in this pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care
• Prior pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care, delivery, and/or postpartum complications Postpartum complications The postpartum period is typically defined as the first 6-12 weeks following delivery of an infant. During this time, postpartum complications can occur either as a result of the normal physiologic changes the body undergoes to return to its prepregnancy state or as complications of the labor and delivery process. Postpartum Complications:
  • May ↑ risk for complications in this pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care, which may be mitigated with additional treatments
  • History of preeclampsia Preeclampsia A complication of pregnancy, characterized by a complex of symptoms including maternal hypertension and proteinuria with or without pathological edema. Symptoms may range between mild and severe. Pre-eclampsia usually occurs after the 20th week of gestation, but may develop before this time in the presence of trophoblastic disease. Hypertensive Pregnancy Disorders with severe features:
    • Treat with low-dose aspirin Aspirin The prototypical analgesic used in the treatment of mild to moderate pain. It has anti-inflammatory and antipyretic properties and acts as an inhibitor of cyclooxygenase which results in the inhibition of the biosynthesis of prostaglandins. Aspirin also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis. Nonsteroidal Antiinflammatory Drugs (NSAIDs) (e.g., 75‒81 mg once daily).^[1,2]
    • Ensure adequate calcium Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Electrolytes intake; supplement with 1.5‒2 g of oral calcium Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Electrolytes daily.^[2]
  • History of gestational diabetes Diabetes Diabetes mellitus (DM) is a metabolic disease characterized by hyperglycemia and dysfunction of the regulation of glucose metabolism by insulin. Type 1 DM is diagnosed mostly in children and young adults as the result of autoimmune destruction of β cells in the pancreas and the resulting lack of insulin. Type 2 DM has a significant association with obesity and is characterized by insulin resistance. Diabetes Mellitus mellitus (GDM): Screen for glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance intolerance in the 1st trimester and again around 28 wGA.^[9]
  • History of cervical insufficiency Cervical insufficiency Cervical dilation without contractions (not labor), due to structural weakness of the cervix Preterm Labor and Birth/2nd-trimester loss due to painless cervical dilation Cervical dilation A measurement of the diameter of the cervical canal, reported in centimeters Normal and Abnormal Labor: Refer patient to Maternal and Fetal Medicine (MFM) for consideration of cervical cerclage.^[1]
  • History of spontaneous preterm delivery:^[12]
    • Serial vaginal sonographic assessments of cervical length (every 1‒4 weeks) from 16‒24 weeks
    • Consider cerclage for cervical lengths < 25 mm.
    • Consider progesterone Progesterone The major progestational steroid that is secreted primarily by the corpus luteum and the placenta. Progesterone acts on the uterus, the mammary glands and the brain. It is required in embryo implantation; pregnancy maintenance, and the development of mammary tissue for milk production. Progesterone, converted from pregnenolone, also serves as an intermediate in the biosynthesis of gonadal steroid hormones and adrenal corticosteroids. Gonadal Hormones supplementation (either vaginal or IM).
  • History of uterine rupture Uterine Rupture A complete separation or tear in the wall of the uterus with or without expulsion of the fetus. It may be due to injuries, multiple pregnancies, large fetus, previous scarring, or obstruction. Antepartum Hemorrhage: Repeat cesarean delivery Repeat cesarean delivery Extraction of the fetus by abdominal hysterotomy anytime following a previous cesarean. Cesarean Delivery should be used.^[13]

Gynecologic history Gynecologic History Prenatal Care:^[1,4]

• Age at menarche Menarche The first menstrual cycle marked by the initiation of menstruation. Menstrual Cycle 
• Typical menstrual cycles → to help assess accuracy of pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care dating using the last menstrual period Last menstrual period The 1st day of a woman’s last menstrual period. By convention, this date is usually used to date pregnancies. Pregnancy: Diagnosis, Physiology, and Care ( LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care)
• History of genital herpes Genital Herpes Genital herpes infections are common sexually transmitted infections caused by herpes simplex virus (HSV) type 1 or 2. Primary infection often presents with systemic, prodromal symptoms followed by clusters of painful, fluid-filled vesicles on an erythematous base, dysuria, and painful lymphadenopathy. Labial and Genital Herpes → patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship with genital HSV HSV Herpes simplex virus (HSV) is a double-stranded DNA virus belonging to the family Herpesviridae. Herpes simplex virus commonly causes recurrent infections involving the skin and mucosal surfaces, including the mouth, lips, eyes, and genitals. Herpes Simplex Virus 1 and 2 should:
  • Receive antiviral Antiviral Antivirals for Hepatitis B prophylaxis Prophylaxis Cephalosporins with acyclovir Acyclovir A guanosine analog that acts as an antimetabolite. Viruses are especially susceptible. Used especially against herpes. Herpes Zoster (Shingles) starting around 36 wGA
  • Be evaluated specifically for any signs of active lesions (including on the cervix Cervix The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Externally, the cervix is lined by stratified squamous cells; however, the cervical canal is lined by columnar epithelium. Uterus, Cervix, and Fallopian Tubes: Anatomy) at the onset of labor
  • Active lesions at the time of labor are a relative contraindication to vaginal delivery.
• Previous gynecologic operations, especially:
  • Procedures to remove uterine fibroids Uterine Fibroids Gynecological Imaging → women with prior full-thickness incisions in the uterine fundus Fundus The superior portion of the body of the stomach above the level of the cardiac notch. Stomach: Anatomy should not labor due to ↑ risk of uterine rupture Uterine Rupture A complete separation or tear in the wall of the uterus with or without expulsion of the fetus. It may be due to injuries, multiple pregnancies, large fetus, previous scarring, or obstruction. Antepartum Hemorrhage
  • Loop electrical excision procedure for abnormal cervical cytology Cervical cytology A procedure in which ectocervical and endocervical cells are collected to evaluate the transformation zone (area at risk for cervical cancer). Cervical Cancer Screening
    • May ↑ risk of a cervical insufficiency Cervical insufficiency Cervical dilation without contractions (not labor), due to structural weakness of the cervix Preterm Labor and Birth/preterm delivery
    • Scar Scar Dermatologic Examination tissue may prevent normal cervical dilation Cervical dilation A measurement of the diameter of the cervical canal, reported in centimeters Normal and Abnormal Labor and ↑ risk for CD

Past medical and surgical history:^[1,4,15]

With the medical history, the physician needs to determine whether the patient has any conditions that alter the course or risks of pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care, and make sure any conditions that may be altered by pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care are appropriately managed. Common examples of important conditions are:  

• Diabetes Diabetes Diabetes mellitus (DM) is a metabolic disease characterized by hyperglycemia and dysfunction of the regulation of glucose metabolism by insulin. Type 1 DM is diagnosed mostly in children and young adults as the result of autoimmune destruction of β cells in the pancreas and the resulting lack of insulin. Type 2 DM has a significant association with obesity and is characterized by insulin resistance. Diabetes Mellitus mellitus: requires close management during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care to maintain normal glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance levels and prevent fetal complications
• Hypothyroidism Hypothyroidism Hypothyroidism is a condition characterized by a deficiency of thyroid hormones. Iodine deficiency is the most common cause worldwide, but Hashimoto’s disease (autoimmune thyroiditis) is the leading cause in non-iodine-deficient regions. Hypothyroidism: Levothyroxine Levothyroxine Thyroid Replacement Therapy dosing often needs to be adjusted during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.
• Hypertension Hypertension Hypertension, or high blood pressure, is a common disease that manifests as elevated systemic arterial pressures. Hypertension is most often asymptomatic and is found incidentally as part of a routine physical examination or during triage for an unrelated medical encounter. Hypertension: ↑ risk for pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care complications, especially poor fetal growth and superimposed preeclampsia Preeclampsia A complication of pregnancy, characterized by a complex of symptoms including maternal hypertension and proteinuria with or without pathological edema. Symptoms may range between mild and severe. Pre-eclampsia usually occurs after the 20th week of gestation, but may develop before this time in the presence of trophoblastic disease. Hypertensive Pregnancy Disorders
• Cardiopulmonary disease: may have ↑ risk with Valsalva during delivery
• Thrombophilia Thrombophilia A disorder of hemostasis in which there is a tendency for the occurrence of thrombosis. Hypercoagulable States (e.g., idiopathic Idiopathic Dermatomyositis thrombocytopenic purpura): may prevent the safe insertion of an epidural catheter during labor
• Autoimmune disease (e.g., systemic lupus erythematosus Systemic lupus erythematosus Systemic lupus erythematosus (SLE) is a chronic autoimmune, inflammatory condition that causes immune-complex deposition in organs, resulting in systemic manifestations. Women, particularly those of African American descent, are more commonly affected. Systemic Lupus Erythematosus):
  • Pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care may cause flares.
  • Verify safety of medications.
• Non-gynecologic surgeries:
  • For example, if the patient presents with abdominal pain Abdominal Pain Acute Abdomen in the right lower quadrant Right lower quadrant Anterior Abdominal Wall: Anatomy but has a history of an appendectomy Appendectomy Appendectomy is an invasive surgical procedure performed with the goal of resecting and extracting the vermiform appendix through either an open or a laparoscopic approach. The most common indication is acute appendicitis. Appendectomy, this rules out appendicitis Appendicitis Appendicitis is the acute inflammation of the vermiform appendix and the most common abdominal surgical emergency globally. The condition has a lifetime risk of 8%. Characteristic features include periumbilical abdominal pain that migrates to the right lower quadrant, fever, anorexia, nausea, and vomiting. Appendicitis.

Family history Family History Adult Health Maintenance:^[1,4,5]

Family history Family History Adult Health Maintenance is important to guide screening Screening Preoperative Care for potential inherited conditions in the fetus.

• Inherited diseases (e.g., thalassemia Thalassemia Thalassemia is a hereditary cause of microcytic hypochromic anemia and results from a deficiency in either the α or β globin chains, resulting in hemoglobinopathy. The presentation of thalassemia depends on the number of defective chains present and can range from being asymptomatic to rendering the more severely affected patients to be transfusion dependent. Thalassemia, cystic Cystic Fibrocystic Change fibrosis Fibrosis Any pathological condition where fibrous connective tissue invades any organ, usually as a consequence of inflammation or other injury. Bronchiolitis Obliterans (CF), sickle cell anemia Sickle cell anemia A disease characterized by chronic hemolytic anemia, episodic painful crises, and pathologic involvement of many organs. It is the clinical expression of homozygosity for hemoglobin S. Sickle Cell Disease)
• Congenital Congenital Chorioretinitis malformations (e.g., cardiac diseases)

Social history Social History Adult Health Maintenance:^[1,4]

• Substance use disorder (may have adverse effects on fetal development):
  • Smoking Smoking Willful or deliberate act of inhaling and exhaling smoke from burning substances or agents held by hand. Interstitial Lung Diseases
  • Alcohol use
  • Drug use disorder
• Presence or absence of support system 
• Screening Screening Preoperative Care for domestic violence

Medication and allergies Allergies A medical specialty concerned with the hypersensitivity of the individual to foreign substances and protection from the resultant infection or disorder. Selective IgA Deficiency:^[1,4]

Medications should be reviewed for:

• Safety in pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care and lactation Lactation The processes of milk secretion by the maternal mammary glands after parturition. The proliferation of the mammary glandular tissue, milk synthesis, and milk expulsion or let down are regulated by the interactions of several hormones including estradiol; progesterone; prolactin; and oxytocin. Breastfeeding
• Dosing adjustments

Physical exam:^[1,3,4,18]

A complete physical exam should be performed. Special attention Attention Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating. Psychiatric Assessment should be paid to:

• Vital signs
• Height, weight, and BMI BMI An indicator of body density as determined by the relationship of body weight to body height. Bmi=weight (kg)/height squared (m2). Bmi correlates with body fat (adipose tissue). Their relationship varies with age and gender. For adults, bmi falls into these categories: below 18. 5 (underweight); 18. 5-24. 9 (normal); 25. 0-29. 9 (overweight); 30. 0 and above (obese). Obesity
• Pelvic exam:
  • Assess adequacy of the bony pelvis Pelvis The pelvis consists of the bony pelvic girdle, the muscular and ligamentous pelvic floor, and the pelvic cavity, which contains viscera, vessels, and multiple nerves and muscles. The pelvic girdle, composed of 2 “hip” bones and the sacrum, is a ring-like bony structure of the axial skeleton that links the vertebral column with the lower extremities. Pelvis: Anatomy (is there enough space for the fetus to pass through during delivery?)
  • Are there any anatomic abnormalities of the vagina Vagina The vagina is the female genital canal, extending from the vulva externally to the cervix uteri internally. The structures have sexual, reproductive, and urinary functions and a rich blood supply, mainly arising from the internal iliac artery. Vagina, Vulva, and Pelvic Floor: Anatomy, cervix Cervix The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Externally, the cervix is lined by stratified squamous cells; however, the cervical canal is lined by columnar epithelium. Uterus, Cervix, and Fallopian Tubes: Anatomy, or perineum Perineum The body region lying between the genital area and the anus on the surface of the trunk, and to the shallow compartment lying deep to this area that is inferior to the pelvic diaphragm. The surface area is between the vulva and the anus in the female, and between the scrotum and the anus in the male. Vagina, Vulva, and Pelvic Floor: Anatomy that may affect labor and/or delivery (e.g., presence of a vaginal septum)?
• Heart and lung exam
• Depression and anxiety Anxiety Feelings or emotions of dread, apprehension, and impending disaster but not disabling as with anxiety disorders. Generalized Anxiety Disorder screening Screening Preoperative Care

Pregnancy confirmation Pregnancy Confirmation Prenatal Care^[11]

Pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care can be confirmed with:

• A urine hCG test
• Assessment of the fetal heart rate Heart rate The number of times the heart ventricles contract per unit of time, usually per minute. Cardiac Physiology (FHR) (either by ultrasound if early in the pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care or by handheld doppler Doppler Ultrasonography applying the doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. Ultrasound (Sonography))

Pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care dating^[11]

An EDD EDD Pregnancy: Diagnosis, Physiology, and Care should be established at every initial prenatal visit. The 2 primary methods to do this are:

• Estimation using the LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care:
  • The date that falls exactly 40 weeks after the LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care
  • Calculated by adding 280 days to the LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care
  • Calculator
• Ultrasonographic measurements:
  • Measure the crown-rump length Crown-Rump Length Obstetric Imaging (CRL) and look up the associated date in a table (though most ultrasound machines will show this along with the measurement).
  • After 14 wga, ultrasound (US) dating should be done using a formula (included in ultrasound software) that uses:
    • Biparietal diameter (BPD)
    • Head circumference Head Circumference Physical Examination of the Newborn (HC)
    • Abdominal circumference (AC)
    • Femur length (FL)
  • US dating is most accurate in the 1st trimester before genetic variation and the effects of intrauterine environment begin to have greater effects on fetal growth.
• Note: Pregnancies that result from assisted reproductive technologies (ART; e.g., in vitro fertilization Fertilization To undergo fertilization, the sperm enters the uterus, travels towards the ampulla of the fallopian tube, and encounters the oocyte. The zona pellucida (the outer layer of the oocyte) deteriorates along with the zygote, which travels towards the uterus and eventually forms a blastocyst, allowing for implantation to occur. Fertilization and First Week) should be dated based on the type of ART.

Establishing the final EDD EDD Pregnancy: Diagnosis, Physiology, and Care:

• References have been established to determine whether an EDD EDD Pregnancy: Diagnosis, Physiology, and Care calculated by LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care matches an EDD EDD Pregnancy: Diagnosis, Physiology, and Care based on US measurements.
• To determine the final EDD EDD Pregnancy: Diagnosis, Physiology, and Care:
  • Use the EDD EDD Pregnancy: Diagnosis, Physiology, and Care from the LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care if that EDD EDD Pregnancy: Diagnosis, Physiology, and Care is consistent with the EDD EDD Pregnancy: Diagnosis, Physiology, and Care obtained from the ultrasound.
  • If the EDD EDD Pregnancy: Diagnosis, Physiology, and Care from the LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care does not match the EDD EDD Pregnancy: Diagnosis, Physiology, and Care obtained from the ultrasound, use the ultrasound measurement.
• Once an EDD EDD Pregnancy: Diagnosis, Physiology, and Care has been established, it does not change during the pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.
• Note: In the United States, pregnancies are considered suboptimally dated if they do not have an ultrasound prior to 22 wGA that confirms (or revises) the EDD EDD Pregnancy: Diagnosis, Physiology, and Care.

Imaging^[2,4,11]

Ultrasonography is the imaging modality of choice and the most accurate tool to estimate gestational age Gestational age The age of the conceptus, beginning from the time of fertilization. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Pregnancy: Diagnosis, Physiology, and Care early in pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care (used in conjunction with the LMP LMP The 1st day of a woman’s LMP Pregnancy: Diagnosis, Physiology, and Care). All pregnant women should have an ultrasound at (or ordered at) the initial visit in order to confirm:

• Pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care and fetal viability
• Fetus location (intrauterine pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care)
• Most accurate due date
• Number of fetuses and chorionicity in multiple gestations (e.g., twins)
• Findings of abnormal uterine and adnexal masses Adnexal Masses Female Genitourinary Examination

Laboratory^[1,4]

There are a number of routine laboratory tests that should be ordered at the initial prenatal visit. These include: 

• CBC
  • Check for current anemia Anemia Anemia is a condition in which individuals have low Hb levels, which can arise from various causes. Anemia is accompanied by a reduced number of RBCs and may manifest with fatigue, shortness of breath, pallor, and weakness. Subtypes are classified by the size of RBCs, chronicity, and etiology. Anemia: Overview and Types and thrombocytopenia Thrombocytopenia Thrombocytopenia occurs when the platelet count is < 150,000 per microliter. The normal range for platelets is usually 150,000-450,000/µL of whole blood. Thrombocytopenia can be a result of decreased production, increased destruction, or splenic sequestration of platelets. Patients are often asymptomatic until platelet counts are < 50,000/µL. Thrombocytopenia.
  • Obtain baseline hemoglobin and platelet counts Platelet counts The number of platelets per unit volume in a sample of venous blood. Coagulation Studies (to compare future values to, since anemia Anemia Anemia is a condition in which individuals have low Hb levels, which can arise from various causes. Anemia is accompanied by a reduced number of RBCs and may manifest with fatigue, shortness of breath, pallor, and weakness. Subtypes are classified by the size of RBCs, chronicity, and etiology. Anemia: Overview and Types and thrombocytopenia Thrombocytopenia Thrombocytopenia occurs when the platelet count is < 150,000 per microliter. The normal range for platelets is usually 150,000-450,000/µL of whole blood. Thrombocytopenia can be a result of decreased production, increased destruction, or splenic sequestration of platelets. Patients are often asymptomatic until platelet counts are < 50,000/µL. Thrombocytopenia are common in pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care).
  • Iron Iron A metallic element with atomic symbol fe, atomic number 26, and atomic weight 55. 85. It is an essential constituent of hemoglobins; cytochromes; and iron-binding proteins. It plays a role in cellular redox reactions and in the transport of oxygen. Trace Elements deficiency anemia Anemia Anemia is a condition in which individuals have low Hb levels, which can arise from various causes. Anemia is accompanied by a reduced number of RBCs and may manifest with fatigue, shortness of breath, pallor, and weakness. Subtypes are classified by the size of RBCs, chronicity, and etiology. Anemia: Overview and Types is the most common. 
    • If present, treat with iron supplementation Iron Supplementation Iron Deficiency Anemia and retest in 3‒4 weeks^[1]
• Blood typing and antibody screening Screening Preoperative Care
  • Identify ABO blood group and rhesus D factor.
  • If the patient is Rh positive, their cells have the Rh antigen Antigen Substances that are recognized by the immune system and induce an immune reaction. Vaccination.
  • If the patient is Rh negative, their cells lack the Rh antigen Antigen Substances that are recognized by the immune system and induce an immune reaction. Vaccination.
    • If they have prior exposure to the Rh antigen Antigen Substances that are recognized by the immune system and induce an immune reaction. Vaccination (such as from placental bleeding with an Rh-positive infant) → patient may have developed antibodies Antibodies Immunoglobulins (Igs), also known as antibodies, are glycoprotein molecules produced by plasma cells that act in immune responses by recognizing and binding particular antigens. The various Ig classes are IgG (the most abundant), IgM, IgE, IgD, and IgA, which differ in their biologic features, structure, target specificity, and distribution. Immunoglobulins: Types and Functions against Rh factor Rh Factor Blood Group Systems (known as sensitization or isoimmunization)
    • The antibodies Antibodies Immunoglobulins (Igs), also known as antibodies, are glycoprotein molecules produced by plasma cells that act in immune responses by recognizing and binding particular antigens. The various Ig classes are IgG (the most abundant), IgM, IgE, IgD, and IgA, which differ in their biologic features, structure, target specificity, and distribution. Immunoglobulins: Types and Functions produced by a sensitized Rh-negative mother may attack an Rh-positive fetus, resulting in fetal demise if not managed appropriately.
  • Rh-negative individuals should be treated with anti-D immunoglobulin 300 µg IM in the following situations:^[1]
    • At 28 wGA
    • Delivery of an Rh-positive newborn Newborn An infant during the first 28 days after birth. Physical Examination of the Newborn
    • Ectopic pregnancy Ectopic pregnancy Ectopic pregnancy refers to the implantation of a fertilized egg (embryo) outside the uterine cavity. The main cause is disruption of the normal anatomy of the fallopian tube. Ectopic Pregnancy
    • Pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care loss or induced abortion Abortion Expulsion of the product of fertilization before completing the term of gestation and without deliberate interference. Spontaneous Abortion
    • Unexplained vaginal bleeding
    • Chorionic villus sampling (CVS) and amniocentesis Amniocentesis Percutaneous transabdominal puncture of the uterus during pregnancy to obtain amniotic fluid. It is commonly used for fetal karyotype determination in order to diagnose abnormal fetal conditions. Polyhydramnios
    • Abdominal trauma and/or placental abruption Placental Abruption Premature separation of the normally implanted placenta from the uterus. Signs of varying degree of severity include uterine bleeding, uterine muscle hypertonia, and fetal distress or fetal death. Antepartum Hemorrhage
  • The antibody screening Screening Preoperative Care is looking for a number of different maternal antibodies Antibodies Immunoglobulins (Igs), also known as antibodies, are glycoprotein molecules produced by plasma cells that act in immune responses by recognizing and binding particular antigens. The various Ig classes are IgG (the most abundant), IgM, IgE, IgD, and IgA, which differ in their biologic features, structure, target specificity, and distribution. Immunoglobulins: Types and Functions (not just Rh D) that may attack fetal blood cells and potentially cause fetal demise.
• Rubella Rubella An acute infectious disease caused by the rubella virus. The virus enters the respiratory tract via airborne droplet and spreads to the lymphatic system. Rubella Virus and varicella antibody titers:
  • Nonimmune individuals are at risk for giving birth to a baby with congenital Congenital Chorioretinitis rubella Rubella An acute infectious disease caused by the rubella virus. The virus enters the respiratory tract via airborne droplet and spreads to the lymphatic system. Rubella Virus or varicella syndromes.
  • Rubella Rubella An acute infectious disease caused by the rubella virus. The virus enters the respiratory tract via airborne droplet and spreads to the lymphatic system. Rubella Virus and varicella vaccines are contraindicated in pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.
  • Nonimmune women should be counseled to avoid sick people and to be vaccinated after pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.
  • Pregnant women exposed to varicella can be treated with immunoglobulin.
• Hepatitis B surface antigen Hepatitis B surface antigen Those hepatitis B antigens found on the surface of the dane particle and on the 20 nm spherical and tubular particles. Several subspecificities of the surface antigen are known. These were formerly called the Australia antigen. Hepatitis B Virus (HBsAg) serology Serology The study of serum, especially of antigen-antibody reactions in vitro. Yellow Fever Virus screening Screening Preoperative Care:^[8]
  • If HBsAg-positive:
    • Confirm with hepatitis B surface antibody Hepatitis B surface antibody Hepatitis B Virus (HBsAb), which will not coexist with HBsAg in chronic carrier Carrier Vaccination states (i.e., HBsAb will be negative in chronic carrier Carrier Vaccination states).
    • Check hepatitis B core antibody Hepatitis B core antibody Hepatitis B Virus (HBcAb), which appears during the initial infection and remains positive for life.
    • Refer to specialist for treatment.
    • Antivirals may be indicated, depending on viral load Viral load The quantity of measurable virus in a body fluid. Change in viral load, measured in plasma, is sometimes used as a surrogate marker in disease progression. HIV Infection and AIDS.
  • If HBsAg-positive, the newborn Newborn An infant during the first 28 days after birth. Physical Examination of the Newborn should be given the vaccine Vaccine Suspensions of killed or attenuated microorganisms (bacteria, viruses, fungi, protozoa), antigenic proteins, synthetic constructs, or other bio-molecular derivatives, administered for the prevention, amelioration, or treatment of infectious and other diseases. Vaccination for hepatitis B Hepatitis B Hepatitis B virus (HBV) is a partially double-stranded DNA virus, which belongs to the Orthohepadnavirus genus and the Hepadnaviridae family. Most individuals with acute HBV infection are asymptomatic or have mild, self-limiting symptoms. Chronic infection can be asymptomatic or create hepatic inflammation, leading to liver cirrhosis and hepatocellular carcinoma (HCC). Hepatitis B Virus virus Virus Viruses are infectious, obligate intracellular parasites composed of a nucleic acid core surrounded by a protein capsid. Viruses can be either naked (non-enveloped) or enveloped. The classification of viruses is complex and based on many factors, including type and structure of the nucleoid and capsid, the presence of an envelope, the replication cycle, and the host range. Virology ( HBV HBV Hepatitis B virus (HBV) is a partially double-stranded DNA virus, which belongs to the Orthohepadnavirus genus and the Hepadnaviridae family. Hepatitis B virus is transmitted by exposure to infectious blood or body fluids. Examples of types of exposure include sexual intercourse, IV drug use, and childbirth. Hepatitis B Virus) and immunoglobulin upon birth to ↓ risk of vertical transmission Vertical transmission The transmission of infectious disease or pathogens from one generation to another. It includes transmission in utero or intrapartum by exposure to blood and secretions, and postpartum exposure via breastfeeding. Congenital TORCH Infections.
• Hepatitis C Hepatitis C Hepatitis C is an infection of the liver caused by the hepatitis C virus (HCV). The infection can be transmitted through infectious blood or body fluids and may be transmitted during childbirth or through IV drug use or sexual intercourse. Hepatitis C virus can cause both acute and chronic hepatitis, ranging from a mild to a serious, lifelong illness including liver cirrhosis and hepatocellular carcinoma (HCC). Hepatitis C Virus screening Screening Preoperative Care:^[17]
  • Recommended in all pregnant women (for each pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care)
  • Hepatitis C Hepatitis C Hepatitis C is an infection of the liver caused by the hepatitis C virus (HCV). The infection can be transmitted through infectious blood or body fluids and may be transmitted during childbirth or through IV drug use or sexual intercourse. Hepatitis C virus can cause both acute and chronic hepatitis, ranging from a mild to a serious, lifelong illness including liver cirrhosis and hepatocellular carcinoma (HCC). Hepatitis C Virus antibody screening Screening Preoperative Care with reflex RNA RNA A polynucleotide consisting essentially of chains with a repeating backbone of phosphate and ribose units to which nitrogenous bases are attached. RNA is unique among biological macromolecules in that it can encode genetic information, serve as an abundant structural component of cells, and also possesses catalytic activity. RNA Types and Structure testing recommended
• HIV HIV Anti-HIV Drugs test:
  • High risk of vertical transmission Vertical transmission The transmission of infectious disease or pathogens from one generation to another. It includes transmission in utero or intrapartum by exposure to blood and secretions, and postpartum exposure via breastfeeding. Congenital TORCH Infections to the infant in poorly controlled HIV HIV Anti-HIV Drugs/ AIDS AIDS Chronic HIV infection and depletion of CD4 cells eventually results in acquired immunodeficiency syndrome (AIDS), which can be diagnosed by the presence of certain opportunistic diseases called AIDS-defining conditions. These conditions include a wide spectrum of bacterial, viral, fungal, and parasitic infections as well as several malignancies and generalized conditions. HIV Infection and AIDS
  • Patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship should be managed with antiretroviral therapy Antiretroviral therapy Antiretroviral therapy (ART) targets the replication cycle of the human immunodeficiency virus (HIV) and is classified based on the viral enzyme or mechanism that is inhibited. The goal of therapy is to suppress viral replication to reach the outcome of undetected viral load. Anti-HIV Drugs.
• Rapid plasma Plasma The residual portion of blood that is left after removal of blood cells by centrifugation without prior blood coagulation. Transfusion Products reagin ( screening Screening Preoperative Care test for syphilis Syphilis Syphilis is a bacterial infection caused by the spirochete Treponema pallidum pallidum (T. p. pallidum), which is usually spread through sexual contact. Syphilis has 4 clinical stages: primary, secondary, latent, and tertiary. Syphilis):
  • If the test is positive, syphilis Syphilis Syphilis is a bacterial infection caused by the spirochete Treponema pallidum pallidum (T. p. pallidum), which is usually spread through sexual contact. Syphilis has 4 clinical stages: primary, secondary, latent, and tertiary. Syphilis should be confirmed with a VDRL VDRL Treponema or treponemal test.
  • Vertical transmission Vertical transmission The transmission of infectious disease or pathogens from one generation to another. It includes transmission in utero or intrapartum by exposure to blood and secretions, and postpartum exposure via breastfeeding. Congenital TORCH Infections is associated with a high incidence Incidence The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from prevalence, which refers to all cases in the population at a given time. Measures of Disease Frequency of neonatal mortality Mortality All deaths reported in a given population. Measures of Health Status and morbidity Morbidity The proportion of patients with a particular disease during a given year per given unit of population. Measures of Health Status.
    • Nonimmune hydrops Hydrops Cholecystitis fetalis
    • Fetal growth restriction Fetal growth restriction Fetal growth restriction (FGR), also known as intrauterine fetal growth restriction (IUGR), is an estimated fetal weight (EFW) or abdominal circumference < 10th percentile for gestational age. The term small for gestational age (SGA) is sometimes erroneously used interchangeably with FGR. Fetal Growth Restriction
    • Skeletal abnormalities
    • Pneumonia Pneumonia Pneumonia or pulmonary inflammation is an acute or chronic inflammation of lung tissue. Causes include infection with bacteria, viruses, or fungi. In more rare cases, pneumonia can also be caused through toxic triggers through inhalation of toxic substances, immunological processes, or in the course of radiotherapy. Pneumonia
    • CNS symptoms
  • Treat with penicillin Penicillin Rheumatic Fever.
• Chlamydia Chlamydia Chlamydiae are obligate intracellular gram-negative bacteria. They lack a peptidoglycan layer and are best visualized using Giemsa stain. The family of Chlamydiaceae comprises 3 pathogens that can infect humans: Chlamydia trachomatis, Chlamydia psittaci, and Chlamydia pneumoniae. Chlamydia and gonorrhea Gonorrhea Gonorrhea is a sexually transmitted infection (STI) caused by the gram-negative bacteria Neisseria gonorrhoeae (N. gonorrhoeae). Gonorrhea may be asymptomatic but commonly manifests as cervicitis or urethritis with less common presentations such as proctitis, conjunctivitis, or pharyngitis. Gonorrhea nucleic acid amplification Nucleic acid amplification Laboratory techniques that involve the in-vitro synthesis of many copies of DNA or RNA from one original template. Septic Arthritis tests (NAAT) 
  • All pregnant women < 25 years of age should be tested.
  • Test pregnant women > 25 years of age with risk factors for STIs STIs Sexually transmitted infections (STIs) or sexually transmitted diseases (STDs) are infections that spread either by vaginal intercourse, anal sex, or oral sex. Symptoms and signs may include vaginal discharge, penile discharge, dysuria, skin lesions (e.g., warts, ulcers) on or around the genitals, and pelvic pain. Some infections can lead to infertility and chronic debilitating disease. Sexually Transmitted Infections (STIs).
  • STIs STIs Sexually transmitted infections (STIs) or sexually transmitted diseases (STDs) are infections that spread either by vaginal intercourse, anal sex, or oral sex. Symptoms and signs may include vaginal discharge, penile discharge, dysuria, skin lesions (e.g., warts, ulcers) on or around the genitals, and pelvic pain. Some infections can lead to infertility and chronic debilitating disease. Sexually Transmitted Infections (STIs) ↑ risk for:
    • Preterm labor Preterm labor Preterm labor refers to regular uterine contractions leading to cervical change prior to 37 weeks of gestation; preterm birth refers to birth prior to 37 weeks of gestation. Preterm birth may be spontaneous due to preterm labor, preterm prelabor rupture of membranes (PPROM), or cervical insufficiency. Preterm Labor and Birth/delivery ( infections Infections Invasion of the host organism by microorganisms or their toxins or by parasites that can cause pathological conditions or diseases. Chronic Granulomatous Disease make the uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy “irritable”)
    • Neonatal infection Neonatal infection Chikungunya Virus
  • If positive in the 1st trimester, repeat testing in 3‒6 months, preferably in the 3rd trimester.
    • Note: This is not a test of cure, but rather a test for repeat infection.
• Urinalysis Urinalysis Examination of urine by chemical, physical, or microscopic means. Routine urinalysis usually includes performing chemical screening tests, determining specific gravity, observing any unusual color or odor, screening for bacteriuria, and examining the sediment microscopically. Urinary Tract Infections (UTIs) in Children and urine culture Urine culture Urinary Tract Infections (UTIs)
  • Screen for proteinuria Proteinuria The presence of proteins in the urine, an indicator of kidney diseases. Nephrotic Syndrome in Children and asymptomatic bacteriuria Asymptomatic Bacteriuria Urinary Tract Infections (UTIs) in Children.
  • Patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship are at increased risk for ascending urinary tract Urinary tract The urinary tract is located in the abdomen and pelvis and consists of the kidneys, ureters, urinary bladder, and urethra. The structures permit the excretion of urine from the body. Urine flows from the kidneys through the ureters to the urinary bladder and out through the urethra. Urinary Tract: Anatomy infections Infections Invasion of the host organism by microorganisms or their toxins or by parasites that can cause pathological conditions or diseases. Chronic Granulomatous Disease (UTIs) (e.g., pyelonephritis Pyelonephritis Pyelonephritis is infection affecting the renal pelvis and the renal parenchyma. This condition arises mostly as a complication of bladder infection that ascends to the upper urinary tract. Pyelonephritis can be acute or chronic (which results from persistent or chronic infections). Typical acute symptoms are flank pain, fever, and nausea with vomiting. T Pyelonephritis and Perinephric Abscess) in pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.
• Pap smear Pap smear Cytological preparation of cells collected from a mucosal surface and stained with Papanicolaou stain. Cervical Cancer Screening
  • Only if indicated by routine screening Screening Preoperative Care guidelines
• TB TB Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis complex bacteria. The bacteria usually attack the lungs but can also damage other parts of the body. Approximately 30% of people around the world are infected with this pathogen, with the majority harboring a latent infection. Tuberculosis spreads through the air when a person with active pulmonary infection coughs or sneezes. Tuberculosis skin Skin The skin, also referred to as the integumentary system, is the largest organ of the body. The skin is primarily composed of the epidermis (outer layer) and dermis (deep layer). The epidermis is primarily composed of keratinocytes that undergo rapid turnover, while the dermis contains dense layers of connective tissue. Skin: Structure and Functions test
  • In high-risk situations, such as close contact with someone infected with TB TB Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis complex bacteria. The bacteria usually attack the lungs but can also damage other parts of the body. Approximately 30% of people around the world are infected with this pathogen, with the majority harboring a latent infection. Tuberculosis spreads through the air when a person with active pulmonary infection coughs or sneezes. Tuberculosis or if infected with HIV HIV Anti-HIV Drugs

Initial visit interventions and counseling^[1‒4]

Supplementation:

• Initiate folic acid supplementation:
  • Generally at least 400 mcg daily
  • Taken 1 month before and during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care can help prevent neural tube Neural tube A tube of ectodermal tissue in an embryo that will give rise to the central nervous system, including the spinal cord and the brain. Lumen within the neural tube is called neural canal which gives rise to the central canal of the spinal cord and the ventricles of the brain. Gastrulation and Neurulation defects
• Prenatal vitamins: typically include both folic acid and iron Iron A metallic element with atomic symbol fe, atomic number 26, and atomic weight 55. 85. It is an essential constituent of hemoglobins; cytochromes; and iron-binding proteins. It plays a role in cellular redox reactions and in the transport of oxygen. Trace Elements to prevent anemia Anemia Anemia is a condition in which individuals have low Hb levels, which can arise from various causes. Anemia is accompanied by a reduced number of RBCs and may manifest with fatigue, shortness of breath, pallor, and weakness. Subtypes are classified by the size of RBCs, chronicity, and etiology. Anemia: Overview and Types

Warning signs:

Patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship should be advised to seek medical attention Attention Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating. Psychiatric Assessment for:

• Bleeding
• Cramping/pelvic pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways

Subsequent Prenatal Visits

After the initial prenatal visit, the regular Regular Insulin schedule for otherwise healthy pregnant women 18–35 years old should be monthly until 28 wGA, bimonthly from 28–36 wGA, and weekly from 36 wGA until delivery.

Assessment^[1,3,4]

At every visit:

• Maternal weight 
• Blood pressure
• Document FHR with auscultation or ultrasound
• Starting at 20 weeks: fundal height (FH) measurement
  • FH should be approximately equal in centimeters to their gestational age Gestational age The age of the conceptus, beginning from the time of fertilization. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Pregnancy: Diagnosis, Physiology, and Care in weeks (+/- 3 cm).
  • FH should continue to grow each visit.
  • Inappropriate FH measurements should prompt further evaluation with an ultrasound to measure:
    • Fetal growth
    • Fluid levels
• Starting around 28 weeks: fetal movement (FM)
  • Patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship should be instructed to do daily fetal kick counts (FKCs).
  • FKCs: should feel at least 10 movements in a 2-hour time period at least once per day
  • Patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship who report decreased FM should be evaluated with fetal monitoring Fetal monitoring The primary goals of antepartum testing and monitoring are to assess fetal well-being, identify treatable situations that may cause complications, and evaluate for chromosomal abnormalities. These tests are divided into screening tests (which include cell-free DNA testing, serum analyte testing, and nuchal translucency measurements), and diagnostic tests, which provide a definitive diagnosis of aneuploidy and include chorionic villus sampling (CVS) and amniocentesis. Antepartum Testing and Monitoring.
• Ask mother about:
  • Abnormal bleeding
  • Contraction-like or cramping abdominal pain Abdominal Pain Acute Abdomen
  • Abnormal loss of fluid

Laboratory and imaging assessments and interventions

18‒22 weeks: full anatomic assessment of the fetus, placenta Placenta A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (chorionic villi) derived from trophoblasts and a maternal portion (decidua) derived from the uterine endometrium. The placenta produces an array of steroid, protein and peptide hormones (placental hormones). Placenta, Umbilical Cord, and Amniotic Cavity, and uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy/ cervix Cervix The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Externally, the cervix is lined by stratified squamous cells; however, the cervical canal is lined by columnar epithelium. Uterus, Cervix, and Fallopian Tubes: Anatomy^[1,4]

24–28 weeks:^[1,4]

• Rh-negative mothers:
  • Repeat Rh and antibody screening Screening Preoperative Care.
  • Administer RhoGam.
• Repeat CBC to look for:
  • Anemia Anemia Anemia is a condition in which individuals have low Hb levels, which can arise from various causes. Anemia is accompanied by a reduced number of RBCs and may manifest with fatigue, shortness of breath, pallor, and weakness. Subtypes are classified by the size of RBCs, chronicity, and etiology. Anemia: Overview and Types 
  • Thrombocytopenia Thrombocytopenia Thrombocytopenia occurs when the platelet count is < 150,000 per microliter. The normal range for platelets is usually 150,000-450,000/µL of whole blood. Thrombocytopenia can be a result of decreased production, increased destruction, or splenic sequestration of platelets. Patients are often asymptomatic until platelet counts are < 50,000/µL. Thrombocytopenia
• Glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance tolerance Tolerance Pharmacokinetics and Pharmacodynamics test (GTT):^[9]
  • Screening Screening Preoperative Care for gestational diabetes Diabetes Diabetes mellitus (DM) is a metabolic disease characterized by hyperglycemia and dysfunction of the regulation of glucose metabolism by insulin. Type 1 DM is diagnosed mostly in children and young adults as the result of autoimmune destruction of β cells in the pancreas and the resulting lack of insulin. Type 2 DM has a significant association with obesity and is characterized by insulin resistance. Diabetes Mellitus mellitus (GDM)
  • A 50 gm 1-hour screening Screening Preoperative Care oral glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance tolerance Tolerance Pharmacokinetics and Pharmacodynamics test ( OGTT OGTT A test to determine the ability of an individual to maintain homeostasis of blood glucose. It includes measuring blood glucose levels in a fasting state, and at prescribed intervals before and after oral glucose intake (75 or 100 g) or intravenous infusion (0. 5 g/kg). Diabetes Mellitus):
    • Normal results are typically defined as a serum glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance level of < 130‒140 mg/dL, measured 1 hour after a 50-g glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance load (thresholds vary within this range).^[1]
  • If the test is abnormal, a 3-hour OGTT OGTT A test to determine the ability of an individual to maintain homeostasis of blood glucose. It includes measuring blood glucose levels in a fasting state, and at prescribed intervals before and after oral glucose intake (75 or 100 g) or intravenous infusion (0. 5 g/kg). Diabetes Mellitus should be performed to diagnose or exclude GDM.
    • Four blood glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance values are obtained: fasting, then at 1, 2, and 3 hours after a 100-g oral glucose Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Lactose Intolerance load.
    • GDM is diagnosed if 2 of the 4 values are abnormal.
    • Multiple different sets of cutoffs are used; the 2 most common are the Carpenter and Coustan thresholds and those put forth by the National Diabetes Diabetes Diabetes mellitus (DM) is a metabolic disease characterized by hyperglycemia and dysfunction of the regulation of glucose metabolism by insulin. Type 1 DM is diagnosed mostly in children and young adults as the result of autoimmune destruction of β cells in the pancreas and the resulting lack of insulin. Type 2 DM has a significant association with obesity and is characterized by insulin resistance. Diabetes Mellitus Data Group (see table for values).

28‒36 weeks:

• Tdap vaccine Vaccine Suspensions of killed or attenuated microorganisms (bacteria, viruses, fungi, protozoa), antigenic proteins, synthetic constructs, or other bio-molecular derivatives, administered for the prevention, amelioration, or treatment of infectious and other diseases. Vaccination in all patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship
• Rescreen for STDs in high-risk patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship.
• Group B streptococcal ( GBS GBS An acute inflammatory autoimmune neuritis caused by t cell- mediated cellular immune response directed towards peripheral myelin. Demyelination occurs in peripheral nerves and nerve roots. The process is often preceded by a viral or bacterial infection, surgery, immunization, lymphoma, or exposure to toxins. Common clinical manifestations include progressive weakness, loss of sensation, and loss of deep tendon reflexes. Weakness of respiratory muscles and autonomic dysfunction may occur. Polyneuropathy) culture:
  • Obtain an anovaginal culture at 35–37 wGA.
  • Group B streptococci ( GBS GBS An acute inflammatory autoimmune neuritis caused by t cell- mediated cellular immune response directed towards peripheral myelin. Demyelination occurs in peripheral nerves and nerve roots. The process is often preceded by a viral or bacterial infection, surgery, immunization, lymphoma, or exposure to toxins. Common clinical manifestations include progressive weakness, loss of sensation, and loss of deep tendon reflexes. Weakness of respiratory muscles and autonomic dysfunction may occur. Polyneuropathy) are a primary cause of neonatal sepsis Sepsis Systemic inflammatory response syndrome with a proven or suspected infectious etiology. When sepsis is associated with organ dysfunction distant from the site of infection, it is called severe sepsis. When sepsis is accompanied by hypotension despite adequate fluid infusion, it is called septic shock. Sepsis and Septic Shock.
  • If positive, then treat intrapartum with a penicillin Penicillin Rheumatic Fever.
• Bedside ultrasound to assess fetal presentation Fetal presentation Fetal presentation describes which part of the fetus will enter through the cervix first, while position is the orientation of the fetus compared to the maternal bony pelvis. Presentations include vertex (the fetal occiput will present through the cervix first), face, brow, shoulder, and breech. Fetal Malpresentation and Malposition (vertex/head down, or breech/buttocks down)

Additional workup/assessments and interventions

Vaccinations recommended in pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care:^[1,4]

• Tdap: at 27‒36 wga
• Influenza Influenza Influenza viruses are members of the Orthomyxoviridae family and the causative organisms of influenza, a highly contagious febrile respiratory disease. There are 3 primary influenza viruses (A, B, and C) and various subtypes, which are classified based on their virulent surface antigens, hemagglutinin (HA) and neuraminidase (NA). Influenza typically presents with a fever, myalgia, headache, and symptoms of an upper respiratory infection. Influenza Viruses/Influenza: at the beginning of flu season (regardless of gestational age Gestational age The age of the conceptus, beginning from the time of fertilization. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Pregnancy: Diagnosis, Physiology, and Care)
• Pneumococcal pneumonia Pneumonia Pneumonia or pulmonary inflammation is an acute or chronic inflammation of lung tissue. Causes include infection with bacteria, viruses, or fungi. In more rare cases, pneumonia can also be caused through toxic triggers through inhalation of toxic substances, immunological processes, or in the course of radiotherapy. Pneumonia: for patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship with functional asplenia Functional Asplenia Asplenia or prior splenectomy Splenectomy Surgical procedure involving either partial or entire removal of the spleen. Rupture of the Spleen
• Hepatitis A Hepatitis A Hepatitis A is caused by the hepatitis A virus (HAV), a nonenveloped virus of the Picornaviridae family with single-stranded RNA. HAV causes an acute, highly contagious hepatitis with unspecific prodromal symptoms such as fever and malaise followed by jaundice and elevated liver transaminases. Hepatitis A Virus, if indicated
• Hepatitis B Hepatitis B Hepatitis B virus (HBV) is a partially double-stranded DNA virus, which belongs to the Orthohepadnavirus genus and the Hepadnaviridae family. Most individuals with acute HBV infection are asymptomatic or have mild, self-limiting symptoms. Chronic infection can be asymptomatic or create hepatic inflammation, leading to liver cirrhosis and hepatocellular carcinoma (HCC). Hepatitis B Virus, if indicated

Antenatal fetal testing:^[1,6] 

• Typically includes either:
  • Non-stress test
  • Biophysical profile Biophysical Profile Obstetric Imaging
  • Modified biophysical profile Biophysical Profile Obstetric Imaging (non-stress test + fluid assessment)
• A partial list of indications and suggested frequency from the US Society for Maternal-Fetal Medicine (SMFM) are reported in the table.

Workup assessments are recommended based on common presenting symptoms.^[1]

In addition to vital signs, fetal heart rate Heart rate The number of times the heart ventricles contract per unit of time, usually per minute. Cardiac Physiology documentation Documentation Systematic organization, storage, retrieval, and dissemination of specialized information, especially of a scientific or technical nature. It often involves authenticating or validating information. Advance Directives, and appropriate history, the workup for common presenting symptoms is detailed in the table.

Prenatal Screening for Genetic Abnormalities

There are a number of noninvasive tests that are available to assist in prenatal diagnosis of genetic conditions. In some cases, if screening Screening Preoperative Care tests are positive, more-invasive prenatal diagnostic techniques are available to provide definite diagnosis. 

Aneuploidy screening tests Aneuploidy Screening Tests Prenatal Care^[1,5]

• Multiple options available
• Options include different combinations of multiple serum analytes and ultrasound, which can include:
  • Ultrasound measurement of the nuchal translucency Nuchal translucency A prenatal ultrasonography measurement of the soft tissue behind the fetal neck. Either the translucent area below the skin in the back of the fetal neck (nuchal translucency) or the distance between occipital bone to the outer skin line (nuchal fold) is measured. Obstetric Imaging 
  • Ultrasound assessment of “soft markers” for aneuploidy (findings more common in fetuses with aneuploidy, which adjust the overall risk); examples include:
    • Echogenic intracardiac Intracardiac Total Anomalous Pulmonary Venous Return (TAPVR) foci (e.g., calcifications)
    • Short femur length
    • Echogenic bowel
  • 1st-trimester serum analytes:
    • Pregnancy-associated plasma Plasma The residual portion of blood that is left after removal of blood cells by centrifugation without prior blood coagulation. Transfusion Products protein A (PAPP-A)
    • β-hCG
  • 2nd-trimester serum analytes:
    • β-hCG
    • Unconjugated estriol Estriol A hydroxylated metabolite of estradiol or estrogen that has a hydroxyl group at C3, 16-alpha, and 17-beta position. Estriol is a major urinary estrogen. During pregnancy, a large amount of estriol is produced by the placenta. Isomers with inversion of the hydroxyl group or groups are called epiestriol. Noncontraceptive Estrogen and Progestins
    • Maternal alpha-fetoprotein Alpha-fetoprotein The first alpha-globulins to appear in mammalian sera during fetal development and the dominant serum proteins in early embryonic life. Hepatocellular Carcinoma (HCC) and Liver Metastases ( AFP AFP The first alpha-globulins to appear in mammalian sera during fetal development and the dominant serum proteins in early embryonic life. Hepatocellular Carcinoma (HCC) and Liver Metastases) level
    • Inhibin A Inhibin A Glycoproteins that inhibit pituitary follicle stimulating hormone secretion. Inhibins are secreted by the sertoli cells of the testes, the granulosa cells of the ovarian follicles, the placenta, and other tissues. Inhibins and activins are modulators of follicle stimulating hormone secretions; both groups belong to the TGF-beta superfamily, as the transforming growth factor beta. Inhibins consist of a disulfide-linked heterodimer with a unique alpha linked to either a beta a or a beta B subunit to form inhibin a or inhibin b, respectively. Menstrual Cycle level
• Cell-free fetal DNA DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA Types and Structure:
  • A screening Screening Preoperative Care test analyzing fetal DNA DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA Types and Structure found in maternal serum (a maternal blood test) 
  • Often referred to as noninvasive prenatal screening Screening Preoperative Care (NIPS)
  • Performed after 10 wGA
  • 99% accurate
• Quad screen Quad Screen Prenatal Care:
  • 2nd-trimester screening Screening Preoperative Care of maternal serum analytes
  • Gives the probability Probability Probability is a mathematical tool used to study randomness and provide predictions about the likelihood of something happening. There are several basic rules of probability that can be used to help determine the probability of multiple events happening together, separately, or sequentially. Basics of Probability of aneuploidy
  • Detection rate: 81%
• Serum-integrated, sequential Sequential Computed Tomography (CT), or contingency screening Screening Preoperative Care:
  • Serum-integrated screening Screening Preoperative Care ( SIS SIS Infertility):
    • Nuchal translucency Nuchal translucency A prenatal ultrasonography measurement of the soft tissue behind the fetal neck. Either the translucent area below the skin in the back of the fetal neck (nuchal translucency) or the distance between occipital bone to the outer skin line (nuchal fold) is measured. Obstetric Imaging + pregnancy-associated plasma Plasma The residual portion of blood that is left after removal of blood cells by centrifugation without prior blood coagulation. Transfusion Products protein A at 10‒13 6/7 wGA, then quad screen Quad Screen Prenatal Care at 15‒22 wGA
    • Detection rate: 96%
  • Sequential Sequential Computed Tomography (CT) screening Screening Preoperative Care:
    • Nuchal translucency Nuchal translucency A prenatal ultrasonography measurement of the soft tissue behind the fetal neck. Either the translucent area below the skin in the back of the fetal neck (nuchal translucency) or the distance between occipital bone to the outer skin line (nuchal fold) is measured. Obstetric Imaging + pregnancy-associated plasma Plasma The residual portion of blood that is left after removal of blood cells by centrifugation without prior blood coagulation. Transfusion Products protein A + hCG at 10‒13 6/7 wGA, then quad screen Quad Screen Prenatal Care at 15‒22 wGA
    • Detection rate: 95%
  • Contingency screening Screening Preoperative Care: nuchal translucency Nuchal translucency A prenatal ultrasonography measurement of the soft tissue behind the fetal neck. Either the translucent area below the skin in the back of the fetal neck (nuchal translucency) or the distance between occipital bone to the outer skin line (nuchal fold) is measured. Obstetric Imaging + pregnancy-associated plasma Plasma The residual portion of blood that is left after removal of blood cells by centrifugation without prior blood coagulation. Transfusion Products protein A + hCG at 10‒13 6/7 wGA
    • If positive → confirmatory/diagnostic testing offered
    • If negative → no further testing
    • If indeterminate → quad screen Quad Screen Prenatal Care at 15‒22 wGA
    • Detection rate: 88%‒94%

Confirmatory diagnostic tests Diagnostic tests Diagnostic tests are important aspects in making a diagnosis. Some of the most important epidemiological values of diagnostic tests include sensitivity and specificity, false positives and false negatives, positive and negative predictive values, likelihood ratios, and pre-test and post-test probabilities. Epidemiological Values of Diagnostic Tests for aneuploidy^[1,5]

If aneuploidy screening tests Aneuploidy Screening Tests Prenatal Care are abnormal, patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship can be referred for more invasive diagnostic testing, which can include:

• Chorionic villus sampling (CVS):
  • Performed at 10–14 wGA
  • A needle is inserted through the maternal abdomen into the chorionic villi Chorionic villi Threadlike vascular projections of the chorion. Chorionic villi may be free or embedded within the decidua forming the site for exchange of substances between fetal and maternal blood (placenta). Placenta, Umbilical Cord, and Amniotic Cavity and blood is drawn.
  • Karyotype Karyotype The full set of chromosomes presented as a systematized array of metaphase chromosomes from a photomicrograph of a single cell nucleus arranged in pairs in descending order of size and according to the position of the centromere. Congenital Malformations of the Female Reproductive System analysis is performed on the fetal blood cells.
• Amniocentesis Amniocentesis Percutaneous transabdominal puncture of the uterus during pregnancy to obtain amniotic fluid. It is commonly used for fetal karyotype determination in order to diagnose abnormal fetal conditions. Polyhydramnios:
  • Performed around 15 wGA or greater
  • A needle is inserted through the maternal abdomen and amniotic fluid Amniotic fluid A clear, yellowish liquid that envelopes the fetus inside the sac of amnion. In the first trimester, it is likely a transudate of maternal or fetal plasma. In the second trimester, amniotic fluid derives primarily from fetal lung and kidney. Cells or substances in this fluid can be removed for prenatal diagnostic tests (amniocentesis). Placenta, Umbilical Cord, and Amniotic Cavity is aspirated.
  • Karyotype Karyotype The full set of chromosomes presented as a systematized array of metaphase chromosomes from a photomicrograph of a single cell nucleus arranged in pairs in descending order of size and according to the position of the centromere. Congenital Malformations of the Female Reproductive System analysis is performed on fetal cells present in the amniotic fluid Amniotic fluid A clear, yellowish liquid that envelopes the fetus inside the sac of amnion. In the first trimester, it is likely a transudate of maternal or fetal plasma. In the second trimester, amniotic fluid derives primarily from fetal lung and kidney. Cells or substances in this fluid can be removed for prenatal diagnostic tests (amniocentesis). Placenta, Umbilical Cord, and Amniotic Cavity.
• Risks of invasive testing:
  • Bleeding
  • Infection
  • Fetal loss
  • Isoimmunization if there is Rh discordance between mother and fetus
• Types of testing available for prenatal genetic diagnosis:
  • Karyotype Karyotype The full set of chromosomes presented as a systematized array of metaphase chromosomes from a photomicrograph of a single cell nucleus arranged in pairs in descending order of size and according to the position of the centromere. Congenital Malformations of the Female Reproductive System
  • Fluorescence in situ hybridization Hybridization The genetic process of crossbreeding between genetically dissimilar parents to produce a hybrid. Blotting Techniques ( FISH FISH A type of in situ hybridization in which target sequences are stained with fluorescent dye so their location and size can be determined using fluorescence microscopy. This staining is sufficiently distinct that the hybridization signal can be seen both in metaphase spreads and in interphase nuclei. Chromosome Testing)
  • Chromosomal microarray
  • Molecular DNA DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA Types and Structure testing

Parental genetic carrier Carrier Vaccination screening Screening Preoperative Care tests^[1,4,5]

Some patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship may be at higher risk than others for certain inherited genetic conditions. Based on specific risk factors, typically including family history Family History Adult Health Maintenance and race/ethnicity, additional genetic screening Genetic Screening Physical Examination of the Newborn can be offered. Most commonly, this includes carrier Carrier Vaccination screening Screening Preoperative Care for:

• Cystic Cystic Fibrocystic Change fibrosis Fibrosis Any pathological condition where fibrous connective tissue invades any organ, usually as a consequence of inflammation or other injury. Bronchiolitis Obliterans (CF)
• Sickle cell anemia Sickle cell anemia A disease characterized by chronic hemolytic anemia, episodic painful crises, and pathologic involvement of many organs. It is the clinical expression of homozygosity for hemoglobin S. Sickle Cell Disease
• Thalassemias
• Spinal muscular atrophy Atrophy Decrease in the size of a cell, tissue, organ, or multiple organs, associated with a variety of pathological conditions such as abnormal cellular changes, ischemia, malnutrition, or hormonal changes. Cellular Adaptation
• Fragile X syndrome Fragile X syndrome Fragile X syndrome (FXS), also known as Martin-Bell syndrome, is a genetic condition with X-linked inheritance. Both boys and girls may be affected, but the severity is much worse in boys. Characteristic features include a long face, prominent forehead and chin, large ears, flat feet, and large testes post-puberty for boys. Fragile X Syndrome
• Ashkenazi Jewish genetic panel (AJGP), which includes multiple conditions, some of which are:
  • Tay-Sachs disease Tay-Sachs disease Tay-Sachs disease is an autosomal recessive lysosomal storage disorder caused by genetic mutations in the hexosaminidase A (HEXA) gene, leading to progressive neurodegeneration. Classic symptoms in infants include rapid degeneration of cognitive and neuromuscular abilities, progressive blindness, and a macular cherry-red spot on physical examination. Tay-Sachs Disease
  • Canavan disease
  • Gaucher disease Gaucher disease Gaucher Disease (GD) is an autosomal recessive lysosomal storage disorder caused by a deficiency of glucocerebrosidase enzyme activity, resulting in accumulation of glucocerebroside in cells and certain organs. The disease is categorized into 3 types with variable clinical presentation. Gaucher Disease
  • Familial dysautonomia Familial dysautonomia An autosomal disorder of the peripheral and autonomic nervous systems limited to individuals of Ashkenazi Jewish descent. Clinical manifestations are present at birth and include diminished lacrimation, defective thermoregulation, orthostatic hypotension, fixed pupils, excessive sweating, loss of pain and temperature sensation, and absent reflexes. Pathologic features include reduced numbers of small diameter peripheral nerve fibers and autonomic ganglion neurons. Hypotension
  • CF
  • Fanconi anemia Fanconi anemia Congenital disorder affecting all bone marrow elements, resulting in anemia; leukopenia; and thrombopenia, and associated with cardiac, renal, and limb malformations as well as dermal pigmentary changes. Spontaneous chromosome breakage is a feature of this disease along with predisposition to leukemia. There are at least 7 complementation groups in Fanconi anemia: fanca, fancb, fancc, fancd1, fancd2, fance, fancf, fancg, and fancl. Aplastic Anemia ( FA FA Inhaled Anesthetics)

Routine Counseling

Physicians Physicians Individuals licensed to practice medicine. Clinician–Patient Relationship play an important role in providing women with accurate information on how to stay safe and healthy during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.

Diet^[1‒3]

Weight gain^[1,3]

The amount of recommended weight gain during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care is based on the patient’s prepregnancy BMI BMI An indicator of body density as determined by the relationship of body weight to body height. Bmi=weight (kg)/height squared (m2). Bmi correlates with body fat (adipose tissue). Their relationship varies with age and gender. For adults, bmi falls into these categories: below 18. 5 (underweight); 18. 5-24. 9 (normal); 25. 0-29. 9 (overweight); 30. 0 and above (obese). Obesity. Normal weight gain recommendations are:

• Underweight ( BMI BMI An indicator of body density as determined by the relationship of body weight to body height. Bmi=weight (kg)/height squared (m2). Bmi correlates with body fat (adipose tissue). Their relationship varies with age and gender. For adults, bmi falls into these categories: below 18. 5 (underweight); 18. 5-24. 9 (normal); 25. 0-29. 9 (overweight); 30. 0 and above (obese). Obesity < 18.5): 28–40 lbs (about 12.5–18 kg)
• Normal weight ( BMI BMI An indicator of body density as determined by the relationship of body weight to body height. Bmi=weight (kg)/height squared (m2). Bmi correlates with body fat (adipose tissue). Their relationship varies with age and gender. For adults, bmi falls into these categories: below 18. 5 (underweight); 18. 5-24. 9 (normal); 25. 0-29. 9 (overweight); 30. 0 and above (obese). Obesity 18.5–24.9) : 25–35 lbs (about 11.5–16 kg)
• Overweight ( BMI BMI An indicator of body density as determined by the relationship of body weight to body height. Bmi=weight (kg)/height squared (m2). Bmi correlates with body fat (adipose tissue). Their relationship varies with age and gender. For adults, bmi falls into these categories: below 18. 5 (underweight); 18. 5-24. 9 (normal); 25. 0-29. 9 (overweight); 30. 0 and above (obese). Obesity 25–29.9) : 15–25 lbs (about 7–11.5 kg)
• Obese ( BMI BMI An indicator of body density as determined by the relationship of body weight to body height. Bmi=weight (kg)/height squared (m2). Bmi correlates with body fat (adipose tissue). Their relationship varies with age and gender. For adults, bmi falls into these categories: below 18. 5 (underweight); 18. 5-24. 9 (normal); 25. 0-29. 9 (overweight); 30. 0 and above (obese). Obesity > 30): 11–20 lbs (about 5–9 kg)
• Note: Weight loss Weight loss Decrease in existing body weight. Bariatric Surgery is not recommended during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care. 

Exercise^[1,3]

• Purpose: controls weight gain, improves delivery, improves weight loss Weight loss Decrease in existing body weight. Bariatric Surgery after pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care
• Recommendation: moderate exercise for 30 minutes on most days of the week
• In general, patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship can continue doing exercises they were doing before pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care, at the same level of intensity (goal: maintain fitness level rather than increasing it).
• Avoid contact sports and/or activities with risk of falling or abdominal trauma (e.g., soccer, horseback riding, downhill skiing).
• Avoid exercising in hot weather due to ↑ risks associated with dehydration Dehydration The condition that results from excessive loss of water from a living organism. Volume Depletion and Dehydration (e.g., preterm labor Preterm labor Preterm labor refers to regular uterine contractions leading to cervical change prior to 37 weeks of gestation; preterm birth refers to birth prior to 37 weeks of gestation. Preterm birth may be spontaneous due to preterm labor, preterm prelabor rupture of membranes (PPROM), or cervical insufficiency. Preterm Labor and Birth)
• Warning signs to terminate exercise:
  • Chest pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways or difficulty breathing
  • Dizziness Dizziness An imprecise term which may refer to a sense of spatial disorientation, motion of the environment, or lightheadedness. Lateral Medullary Syndrome (Wallenberg Syndrome)
  • Vaginal bleeding or leakage of fluid
  • Regular Regular Insulin contractions
  • Decreased fetal movement
  • Muscle weakness
• Contraindications Contraindications A condition or factor associated with a recipient that makes the use of a drug, procedure, or physical agent improper or inadvisable. Contraindications may be absolute (life threatening) or relative (higher risk of complications in which benefits may outweigh risks). Noninvasive Ventilation to aerobic exercise:
  • Hemodynamically significant heart disease
  • Restrictive lung disease
  • Cervical insufficiency Cervical insufficiency Cervical dilation without contractions (not labor), due to structural weakness of the cervix Preterm Labor and Birth or cerclage
  • Persistent vaginal bleeding
  • Placenta previa Placenta Previa Abnormal placentation in which the placenta implants in the lower segment of the uterus (the zone of dilation) and may cover part or all of the opening of the cervix. It is often associated with serious antepartum bleeding and premature labor. Placental Abnormalities in the 3rd trimester
  • Pregnancy-induced hypertension Pregnancy-induced Hypertension A condition in pregnant women with elevated systolic (>140 mm hg) and diastolic (>90 mm hg) blood pressure on at least two occasions 6 h apart. Hypertension complicates 8-10% of all pregnancies, generally after 20 weeks of gestation. Gestational hypertension can be divided into several broad categories according to the complexity and associated symptoms, such as edema; proteinuria; seizures; abnormalities in blood coagulation and liver functions. Hypertensive Pregnancy Disorders

Pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways^[3,4]

• Pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care hormones Hormones Hormones are messenger molecules that are synthesized in one part of the body and move through the bloodstream to exert specific regulatory effects on another part of the body. Hormones play critical roles in coordinating cellular activities throughout the body in response to the constant changes in both the internal and external environments. Hormones: Overview and Types (e.g., progesterone Progesterone The major progestational steroid that is secreted primarily by the corpus luteum and the placenta. Progesterone acts on the uterus, the mammary glands and the brain. It is required in embryo implantation; pregnancy maintenance, and the development of mammary tissue for milk production. Progesterone, converted from pregnenolone, also serves as an intermediate in the biosynthesis of gonadal steroid hormones and adrenal corticosteroids. Gonadal Hormones, relaxin) cause ligaments to stretch more easily and ↑ water retention.
• Common pains:
  • Pelvic pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways from stretching at the pubic symphysis Pubic Symphysis A slightly movable cartilaginous joint which occurs between the pubic bones. Vagina, Vulva, and Pelvic Floor: Anatomy and sacroiliac joints → maternity support belts can help
  • Round ligament Round ligament A fibromuscular band that attaches to the uterus and then passes along the broad ligament, out through the inguinal ring, and into the labium majus. Uterus, Cervix, and Fallopian Tubes: Anatomy pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways (see below)
  • Foot Foot The foot is the terminal portion of the lower limb, whose primary function is to bear weight and facilitate locomotion. The foot comprises 26 bones, including the tarsal bones, metatarsal bones, and phalanges. The bones of the foot form longitudinal and transverse arches and are supported by various muscles, ligaments, and tendons. Foot: Anatomy pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways
  • Low back pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways (from shifting center of gravity)
  • Carpal tunnel Carpal Tunnel The carpal tunnel is formed by the transverse carpal ligament (flexor retinaculum) superiorly and the carpal bones inferiorly. Carpal Tunnel Syndrome syndrome (CTS)
• Round ligament Round ligament A fibromuscular band that attaches to the uterus and then passes along the broad ligament, out through the inguinal ring, and into the labium majus. Uterus, Cervix, and Fallopian Tubes: Anatomy pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways:
  • The round ligaments are ligaments attaching the uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy to the pelvic sidewall.
  • As the uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy grows, these ligaments can stretch and cause pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways.
  • Differentiating round ligament Round ligament A fibromuscular band that attaches to the uterus and then passes along the broad ligament, out through the inguinal ring, and into the labium majus. Uterus, Cervix, and Fallopian Tubes: Anatomy pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways ( benign Benign Fibroadenoma) from more concerning pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways:
    • Round ligament Round ligament A fibromuscular band that attaches to the uterus and then passes along the broad ligament, out through the inguinal ring, and into the labium majus. Uterus, Cervix, and Fallopian Tubes: Anatomy pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways is often unilateral.
    • On exam, push the uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy toward the painful side; if this maneuver relieves the pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways, it is likely round ligament Round ligament A fibromuscular band that attaches to the uterus and then passes along the broad ligament, out through the inguinal ring, and into the labium majus. Uterus, Cervix, and Fallopian Tubes: Anatomy pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways.
• Analgesic use:
  • Regular Regular Insulin exercise can help with low back and pelvic pain Pain An unpleasant sensation induced by noxious stimuli which are detected by nerve endings of nociceptive neurons. Pain: Types and Pathways.
  • Acetaminophen Acetaminophen Acetaminophen is an over-the-counter nonopioid analgesic and antipyretic medication and the most commonly used analgesic worldwide. Despite the widespread use of acetaminophen, its mechanism of action is not entirely understood. Acetaminophen is the safest analgesic.
  • Try to avoid NSAIDs NSAIDS Primary vs Secondary Headaches because of their effects on the fetal kidneys Kidneys The kidneys are a pair of bean-shaped organs located retroperitoneally against the posterior wall of the abdomen on either side of the spine. As part of the urinary tract, the kidneys are responsible for blood filtration and excretion of water-soluble waste in the urine. Kidneys: Anatomy.

GI symptoms

• Nausea Nausea An unpleasant sensation in the stomach usually accompanied by the urge to vomit. Common causes are early pregnancy, sea and motion sickness, emotional stress, intense pain, food poisoning, and various enteroviruses. Antiemetics and vomiting Vomiting The forcible expulsion of the contents of the stomach through the mouth. Hypokalemia:^[10]
  • Common, especially in early pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care (colloquially, “morning sickness”)
  • More common in the mornings but may occur throughout the day
  • Often improves in the early 2nd trimester
  • Management:
    • Ginger has some evidence of benefit.
    • Chamomile is also recommended by the WHO.
    • Vitamin B₆ supplementation
    • If symptoms persist, see table for additional options.
    • Dietary changes: Eat first thing in the morning, and eat smaller, more frequent meals.
• Acid reflux/ heartburn Heartburn Substernal pain or burning sensation, usually associated with regurgitation of gastric juice into the esophagus. Gastroesophageal Reflux Disease (GERD):^[2‒4]
  • Encourage diet and lifestyle changes.
  • Antacids can be used for refractory symptoms.
• Constipation Constipation Constipation is common and may be due to a variety of causes. Constipation is generally defined as bowel movement frequency < 3 times per week. Patients who are constipated often strain to pass hard stools. The condition is classified as primary (also known as idiopathic or functional constipation) or secondary, and as acute or chronic. Constipation: Encourage increased fiber (e.g., wheat bran) and water consumption.^[2,3] 

Safety^[1]

• Air travel is safe up to 36 weeks, after which risk of labor or complications on board ↑:
  • Air travel should be avoided in patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship with medical or obstetric conditions that may require emergent care.
  • Prolonged immobilization Immobilization Delirium on longer flights ↑ risk of venous thromboembolic events → patients Patients Individuals participating in the health care system for the purpose of receiving therapeutic, diagnostic, or preventive procedures. Clinician–Patient Relationship should be advised to:
    • Wear compression Compression Blunt Chest Trauma stockings
    • Move about the cabin every 1‒2 hours
    • Maintain adequate hydration
• Deep vein thrombosis Thrombosis Formation and development of a thrombus or blood clot in the blood vessel. Epidemic Typhus ( DVT DVT Deep vein thrombosis (DVT) usually occurs in the deep veins of the lower extremities. The affected veins include the femoral, popliteal, iliofemoral, and pelvic veins. Proximal DVT is more likely to cause a pulmonary embolism (PE) and is generally considered more serious. Deep Vein Thrombosis) precautions for long trips (both flights and car trips):
  • Compression Compression Blunt Chest Trauma stockings
  • Frequent hydration
  • Frequent ambulation around the plane or at rest stops (every 1–2 hours)
• Seat belts:
  • Lap belt should be worn low on the hips, “below” the uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy.
  • Shoulder belt should be worn between the breasts Breasts The breasts are found on the anterior thoracic wall and consist of mammary glands surrounded by connective tissue. The mammary glands are modified apocrine sweat glands that produce milk, which serves as nutrition for infants. Breasts are rudimentary and usually nonfunctioning in men. Breasts: Anatomy and directed laterally to the uterus Uterus The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. The uterus has a thick wall made of smooth muscle (the myometrium) and an inner mucosal layer (the endometrium). The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Uterus, Cervix, and Fallopian Tubes: Anatomy.
• Screen for intimate partner violence Intimate partner violence A pattern of assaultive and coercive behavior by an individual against their partner or spouse that may include physical injury, psychological abuse, sexual assault, progressive isolation, stalking, deprivation, intimidation, and reproductive coercion. Sexual Abuse (IPV), which can increase during pregnancy Pregnancy The status during which female mammals carry their developing young (embryos or fetuses) in utero before birth, beginning from fertilization to birth. Pregnancy: Diagnosis, Physiology, and Care.
• Frequent hand-washing
• Avoid kitty litter (to ↓ risk of toxoplasmosis Toxoplasmosis Toxoplasmosis is an infectious disease caused by Toxoplasma gondii, an obligate intracellular protozoan parasite. Felines are the definitive host, but transmission to humans can occur through contact with cat feces or the consumption of contaminated foods. The clinical presentation and complications depend on the host’s immune status. Toxoplasma/Toxoplasmosis)