Prenatal Care — MCQs

A 25-year-old female, 5 months pregnant, presents for the first time without prior prenatal care. She is 168 cm tall, weighs 59 kg, and her blood pressure is 120/84 mm Hg. Fundal height is 17 cm, fetal movements are appreciated, and FHR is 140/min. Her past medical history is significant for hypertension, for which she takes enalapril. Dipstick results are negative. Which of the following tests should be performed?

Q350Easy

The optimal gestational age for chorionic villus sampling is:

Prenatal Care Indian Medical PG Practice Questions and MCQs

Question 341: Bluish discoloration of the vagina seen in pregnancy is known as:

A. Chadwick's sign (Correct Answer)
B. Goodell's sign
C. Hegar's sign
D. Palmer's sign

Explanation: **Explanation:** The correct answer is **Chadwick’s sign**. This clinical finding refers to the bluish or purplish discoloration of the cervix, vagina, and labia minora. It is caused by **venous congestion** and increased vascularity in the pelvic organs due to rising estrogen levels during pregnancy. It typically appears around the **6th to 8th week** of gestation and is considered a presumptive sign of pregnancy. **Analysis of Incorrect Options:** * **Goodell’s sign:** This refers to the significant **softening of the cervix** (which normally feels like the tip of the nose but becomes soft like the lips). It usually appears around the 6th week. * **Hegar’s sign:** This is the softening of the **isthmus** (the lower uterine segment). On bimanual examination, the upper part of the uterus and the cervix feel like two separate entities because the isthmus is so soft it cannot be felt. It is best demonstrated between **6–10 weeks**. * **Palmer’s sign:** This refers to regular, rhythmic, and painless **uterine contractions** that can be felt during a bimanual examination as early as 4–8 weeks of pregnancy. **High-Yield Clinical Pearls for NEET-PG:** * **Jacquemier’s sign:** Often used synonymously with Chadwick’s sign, specifically referring to the discoloration of the vaginal mucosa. * **Osiander’s sign:** Increased pulsation felt through the lateral vaginal fornices due to increased vascularity (8th week). * **Piskacek’s sign:** Asymmetrical enlargement of the uterus if implantation occurs near one of the cornua. * **Ladins sign:** Softening of the anterior midline of the uterus at the cervico-uterine junction (6th week).

Question 342: Which of the following statements is incorrect regarding the management of iron deficiency anemia in pregnancy?

A. Oral iron therapy is not recommended if anemia is detected after 20 weeks of pregnancy. (Correct Answer)
B. Parenteral iron therapy typically leads to a significant increase in reticulocyte count within 7-14 days.
C. Parenteral iron therapy is considered ideal during the period of 30-36 weeks of gestation.
D. Blood transfusion may be indicated for severe anemia in patients beyond 36 weeks of gestation.

Explanation: ### Explanation **1. Why Option A is the Correct Answer (Incorrect Statement):** Oral iron therapy is the **first-line treatment** for mild to moderate iron deficiency anemia (IDA) in pregnancy, regardless of the gestational age, provided the patient is compliant and has enough time to reach target hemoglobin levels before delivery. The statement that it is "not recommended after 20 weeks" is medically inaccurate; in fact, iron requirements peak during the second and third trimesters. **2. Analysis of Other Options:** * **Option B:** Following parenteral iron administration, a "reticulocyte response" (increase in young RBCs) is the earliest sign of recovery, typically peaking between **7 to 14 days**. * **Option C:** Parenteral iron is preferred between **30–36 weeks** if the patient has moderate anemia. This is because oral iron takes 6–8 weeks to significantly raise hemoglobin, which may be too slow as the patient approaches term. * **Option D:** Blood transfusion is indicated for **severe anemia (Hb <7 g/dL)** near term (beyond 36 weeks) or if the patient is symptomatic (e.g., heart failure), as there is insufficient time for pharmacological interventions to work before labor. **3. Clinical Pearls for NEET-PG:** * **WHO Definition:** Anemia in pregnancy is defined as **Hb <11 g/dL**. * **Prophylactic Dose:** 60 mg elemental iron + 400 µg folic acid daily (IFA program). * **Therapeutic Dose:** 100–200 mg elemental iron daily. * **Parenteral Iron Indications:** Non-compliance, malabsorption (IBD), or moderate anemia late in pregnancy (30–36 weeks). * **Target:** A rise in Hb of **0.7–1 g/dL per week** is expected with effective therapy.

Question 343: Pawlik's grip is done in obstetrics for assessment of?

A. Gestational age
B. Fetal maturity
C. Presenting part (Correct Answer)
D. Labour

Explanation: **Explanation:** **Pawlik’s Grip**, also known as the **Third Leopold Maneuver**, is a clinical examination technique used to identify the **presenting part** and its mobility. 1. **Why it is correct:** The examiner uses one hand (usually the right) to grasp the lower pole of the uterus just above the symphysis pubis between the thumb and fingers. This maneuver confirms the findings of the first maneuver (Fundal grip) regarding the fetal pole. It helps determine if the presenting part is the head (hard, globular, ballotable) or breech (soft, irregular) and assesses whether the head is **engaged** or still mobile. 2. **Why other options are incorrect:** * **Gestational Age:** This is primarily assessed via the **Symphysio-fundal height (SFH)** or the first Leopold maneuver (Fundal grip) to estimate the height of the fundus relative to maternal landmarks. * **Fetal Maturity:** This refers to functional development (e.g., lung maturity) and is assessed via ultrasound parameters or amniocentesis, not by abdominal palpation. * **Labour:** While Pawlik’s grip can show if the head is engaged (a prerequisite for labor), labor itself is diagnosed by regular uterine contractions and progressive cervical changes. **High-Yield Clinical Pearls for NEET-PG:** * **Leopold Maneuvers Summary:** * **1st (Fundal Grip):** Identifies which fetal pole occupies the fundus. * **2nd (Lateral/Umbilical Grip):** Identifies the fetal back and limbs. * **3rd (Pawlik’s Grip):** Identifies the presenting part and its engagement (single-handed). * **4th (Pelvic Grip):** Confirms engagement and determines the **attitude** of the head (requires the examiner to face the patient's feet). * **Key Distinction:** Pawlik’s grip is the only maneuver performed with a **single hand**.

Question 344: An obese, 25-year-old G1P0 presents at 8 weeks gestational age for her first prenatal visit. She is concerned about her weight and wants advice on a diet and exercise regimen for a healthy pregnancy. What should NOT be advised to the patient during the counseling session?

A. Marked obesity in pregnancy increases the risk of developing diabetes, hypertension, and fetal macrosomia.
B. She should gain at least 25 lb during the pregnancy because nutritional deprivation can result in impaired fetal brain development and intrauterine fetal growth retardation. (Correct Answer)
C. Obese women will still have adequate fetal growth in the absence of any weight gain during pregnancy.
D. She should avoid initiating a vigorous exercise program to get in shape.

Explanation: ### Explanation **Why Option B is the Correct Answer (The "NOT" advice):** According to the **Institute of Medicine (IOM) guidelines**, weight gain recommendations in pregnancy are strictly based on the pre-pregnancy Body Mass Index (BMI). For an **obese patient (BMI ≥ 30 kg/m²)**, the recommended total weight gain is only **11–20 lbs (5–9 kg)**. Advising a gain of "at least 25 lbs" is incorrect and potentially harmful, as excessive gestational weight gain in obese women further increases the risks of gestational diabetes, preeclampsia, and cesarean delivery. While severe starvation is avoided, controlled weight restriction in obese women does not cause fetal brain impairment. **Analysis of Incorrect Options:** * **Option A:** This is a **correct statement**. Obesity is a high-risk state associated with metabolic complications (GDM, PIH) and fetal overgrowth (macrosomia) due to insulin resistance. * **Option C:** This is a **correct statement**. Obese women have significant endogenous fat stores. Studies show that if an obese woman gains little to no weight, fetal growth is usually unaffected because the fetus utilizes the mother’s existing energy reserves. * **Option D:** This is a **correct statement**. Pregnancy is not the time to initiate a *new*, vigorous, or strenuous exercise regimen. While moderate exercise (e.g., brisk walking) is encouraged, "getting in shape" via high-intensity training can lead to musculoskeletal injury or reduced uterine perfusion. **NEET-PG High-Yield Pearls:** * **IOM Weight Gain Guidelines:** * Underweight (BMI <18.5): 28–40 lbs * Normal (BMI 18.5–24.9): 25–35 lbs * Overweight (BMI 25–29.9): 15–25 lbs * **Obese (BMI >30): 11–20 lbs** * **Folic Acid:** Obese women are at a higher risk for Neural Tube Defects (NTDs) and may require higher doses of folic acid. * **Screening:** Obese patients should undergo **early screening for GDM** (at the first prenatal visit) rather than waiting until 24–28 weeks.

Question 345: In a pregnant patient with an elevated maternal serum alpha-fetoprotein (MSAFP), what is the recommended next step?

A. Repeat MSAFP measurement at a later date
B. Perform an ultrasound (USG) (Correct Answer)
C. Perform amniocentesis
D. Consider termination of pregnancy

Explanation: **Explanation:** The management of an elevated Maternal Serum Alpha-Fetoprotein (MSAFP) follows a specific diagnostic algorithm. MSAFP is a screening tool, not a diagnostic one, and is most commonly elevated due to **incorrect dating** rather than fetal pathology. **1. Why Ultrasound (USG) is the correct next step:** The primary goal after an elevated MSAFP is to rule out physiological or benign causes. An ultrasound is performed to: * **Confirm Gestational Age:** MSAFP levels rise with pregnancy duration; if the pregnancy is further along than calculated by LMP, the level will appear falsely elevated. * **Identify Multiple Gestations:** Twins or triplets produce more AFP. * **Detect Fetal Demise:** AFP increases significantly following fetal death. * **Identify Structural Defects:** High-resolution USG can directly visualize Neural Tube Defects (NTDs), abdominal wall defects (omphalocele/gastroschisis), or renal anomalies. **2. Why other options are incorrect:** * **Option A:** Repeating the test is not recommended as it delays diagnosis and the window for screening (15–20 weeks) is narrow. * **Option C:** Amniocentesis (to check amniotic fluid AFP and Acetylcholinesterase) is an invasive procedure reserved for cases where USG is inconclusive or structural anomalies are suspected but not clearly visualized. * **Option D:** Termination is never the immediate step based on a screening test; a definitive diagnosis via USG or invasive testing is mandatory first. **NEET-PG High-Yield Pearls:** * **Ideal timing for MSAFP:** 16–18 weeks (Window: 15–20 weeks). * **Causes of Elevated MSAFP:** NTDs (Anencephaly, Spina Bifida), Omphalocele, Gastroschisis, Multiple pregnancy, and Renal anomalies (Finnish-type nephrosis). * **Causes of Low MSAFP:** Down Syndrome (Trisomy 21), Trisomy 18, Gestational Trophoblastic Disease, and Maternal Obesity. * **Most common cause of abnormal MSAFP:** Incorrect dating.

Question 346: Which of the following statements regarding chorionic villous sampling is FALSE?

A. Chorionic villous sampling is typically performed between 10-13 weeks of gestation. (Correct Answer)
B. Chorionic villous sampling is used for the detection of chromosomal abnormalities.
C. Increased nuchal translucency is an indication for chorionic villous sampling.
D. The sample for chorionic villous sampling is taken from the developing placenta.

Explanation: **Explanation:** The question asks for the **FALSE** statement regarding Chorionic Villous Sampling (CVS). **Why Option A is the Correct (False) Statement:** While CVS is indeed performed between **10–13 weeks** of gestation, the phrasing in the question marks this as the "correct" answer because, in the context of standard NEET-PG MCQ patterns, this is often a "fact-check" question. However, medically, CVS is contraindicated **before 10 weeks** due to the increased risk of **limb reduction defects** (oromandibular limb hypogenesis syndrome). If Option A is marked as the false statement in your key, it is likely due to a technicality in the timing range or a distractor; however, in standard clinical practice, 10–13 weeks is the correct window. *Note: If this is a "select the false statement" question and A is the key, ensure you check if the source implies a different range (e.g., 11–14 weeks).* **Analysis of Other Options:** * **Option B:** **True.** CVS is a diagnostic test used to obtain fetal karyotype for detecting chromosomal abnormalities like Trisomy 21, 18, and 13. * **Option C:** **True.** An increased Nuchal Translucency (NT) on a first-trimester scan is a major indication for CVS to rule out aneuploidy. * **Option D:** **True.** CVS involves aspirating trophoblastic tissue from the **chorion frondosum**, which is the precursor to the developing placenta. **High-Yield Clinical Pearls for NEET-PG:** * **Route:** Can be performed Transabdominally (most common) or Transcervically. * **Advantage over Amniocentesis:** Provides earlier diagnosis (1st trimester vs. 2nd trimester). * **Disadvantage:** Cannot detect **Neural Tube Defects (NTDs)** because it does not sample amniotic fluid for alpha-fetoprotein. * **Complication:** Confined Placental Mosaicism (CPM) can occur in 1-2% of cases, leading to a discrepancy between placental and fetal genetics.

Question 347: What is the most sensitive test for measuring serum hCG levels for the diagnosis of pregnancy?

A. Serum beta hCG by ELISA
B. Urine pregnancy test
C. Immuno Radiometric assay (Correct Answer)
D. Radio Immunoassay

Explanation: **Explanation:** The diagnosis of pregnancy relies on the detection of Human Chorionic Gonadotropin (hCG). The sensitivity of a test refers to its ability to detect the lowest possible concentration of this hormone. **Why Immuno Radiometric Assay (IRMA) is correct:** IRMA is currently the most sensitive method for measuring serum hCG. Unlike traditional assays, IRMA uses a "sandwich" technique with two different antibodies directed against different epitopes of the hCG molecule. One antibody is usually fixed to a solid phase, and the second is radiolabeled. This method allows for the detection of hCG levels as low as **0.01–2 mIU/mL**, making it superior for very early pregnancy detection and monitoring trophoblastic diseases. **Analysis of Incorrect Options:** * **Radio Immunoassay (RIA):** While highly sensitive (detecting ~5 mIU/mL), it is less sensitive than IRMA. RIA is a competitive binding assay, whereas IRMA is a non-competitive assay, which provides a higher signal-to-noise ratio. * **Serum beta hCG by ELISA:** This is a common laboratory method with a sensitivity of approximately **5–10 mIU/mL**. While excellent for routine clinical use, it does not reach the ultra-low detection limits of IRMA. * **Urine Pregnancy Test:** These are qualitative immunochromatographic tests. They are the least sensitive, typically requiring hCG levels of **20–25 mIU/mL** to show a positive result. **Clinical Pearls for NEET-PG:** * **Earliest Detection:** hCG can be detected in maternal serum as early as **8–9 days after fertilization** (around the time of implantation). * **Doubling Time:** In a healthy intrauterine pregnancy, serum hCG levels double approximately every **48 hours** during the first 8 weeks. * **Discriminatory Zone:** The level of hCG at which a gestational sac should be visible on Transvaginal Sonography (TVS) is **1500–2000 mIU/mL**. * **Peak Levels:** hCG levels reach their peak at **8–11 weeks** of gestation (approx. 100,000 mIU/mL).

Question 348: A pregnant female with a family history of a genetic disorder is considered for transabdominal chorionic villus sampling (CVS). What is the optimal gestational age range for this procedure?

A. 7-9 weeks
B. 10 weeks to term (Correct Answer)
C. 9-11 weeks
D. 13-15 weeks

Explanation: **Explanation:** **Chorionic Villus Sampling (CVS)** is a prenatal diagnostic procedure used to obtain fetal tissue for chromosomal analysis, biochemical studies, or DNA analysis. **1. Why Option B is Correct:** The optimal window for performing CVS is **10 to 13 weeks** of gestation. However, technically and clinically, transabdominal CVS can be performed from **10 weeks until term**. While amniocentesis is the preferred procedure after 15 weeks due to its lower risk profile, CVS remains a viable option throughout pregnancy if rapid results or specific placental biopsy is required (e.g., in cases of late-onset oligohydramnios where amniocentesis is difficult). **2. Why Other Options are Incorrect:** * **Options A & C (7-11 weeks):** Performing CVS **before 10 weeks** is strictly contraindicated. Early CVS is associated with a significant risk of **Limb Reduction Defects** (e.g., oromandibular-limb hypogenesis) due to vascular disruption during the procedure. * **Option D (13-15 weeks):** While CVS can be done during this window, it is not the "optimal" starting range. Furthermore, by 15 weeks, amniocentesis becomes the gold standard diagnostic test. **High-Yield Clinical Pearls for NEET-PG:** * **Route:** CVS can be performed Transcervically (10–13 weeks) or Transabdominally (10 weeks to term). * **Advantage:** The primary benefit of CVS over amniocentesis is **earlier diagnosis** in the first trimester, allowing for safer and more private termination of pregnancy if abnormalities are found. * **Complications:** The procedure-related pregnancy loss rate is approximately 0.5–1%. * **Confined Placental Mosaicism:** A unique drawback of CVS where the placenta has a different genetic makeup than the fetus, potentially leading to false positives.

Question 349: A 25-year-old female, 5 months pregnant, presents for the first time without prior prenatal care. She is 168 cm tall, weighs 59 kg, and her blood pressure is 120/84 mm Hg. Fundal height is 17 cm, fetal movements are appreciated, and FHR is 140/min. Her past medical history is significant for hypertension, for which she takes enalapril. Dipstick results are negative. Which of the following tests should be performed?

A. Chorionic Villus Sampling (CVS)
B. Group B Streptococcus testing
C. Triple test
D. Ultrasound of fetal kidneys (Correct Answer)

Explanation: **Explanation:** The core issue in this clinical scenario is the use of **Enalapril**, an ACE inhibitor (ACEi), during pregnancy. ACE inhibitors are known teratogens, specifically categorized as FDA Category D. **1. Why Ultrasound of Fetal Kidneys is Correct:** ACE inhibitors interfere with the fetal renin-angiotensin-aldosterone system (RAAS), which is essential for normal fetal renal development and function. Exposure, particularly in the second and third trimesters, leads to **ACE inhibitor fetopathy**. This is characterized by fetal renal tubular dysgenesis, which results in **oligohydramnios** (due to decreased fetal urine production). This can further lead to pulmonary hypoplasia, limb contractures, and calvarial hypoplasia. Therefore, an ultrasound to assess fetal kidneys and amniotic fluid volume is the immediate priority. **2. Why Other Options are Incorrect:** * **A. Chorionic Villus Sampling (CVS):** CVS is typically performed between 10–13 weeks of gestation. At 5 months (approx. 20 weeks), it is too late for CVS. * **B. Group B Streptococcus (GBS) testing:** Screening for GBS is routinely performed between 36 0/7 and 37 6/7 weeks of gestation, not at 20 weeks. * **C. Triple test:** This screening for aneuploidies and neural tube defects is performed between 15–20 weeks. While the patient is in this window, the immediate risk posed by ACEi exposure (structural renal damage) takes precedence, and ultrasound is a better diagnostic tool for both anatomy and potential complications. **Clinical Pearls for NEET-PG:** * **ACEi/ARBs in Pregnancy:** Contraindicated. They cause renal agenesis, oligohydramnios, and "Potter-like" sequence. * **Antihypertensives of Choice:** Labetalol (1st line), Methyldopa, or Nifedipine. * **Critical Window:** While ACEi are most dangerous in the 2nd/3rd trimester for renal issues, 1st-trimester exposure is linked to cardiac and CNS malformations.

Question 350: The optimal gestational age for chorionic villus sampling is:

A. 6-8 weeks
B. 7-9 weeks
C. 9-11 weeks
D. 11-13 weeks (Correct Answer)

Explanation: **Explanation:** **Chorionic Villus Sampling (CVS)** is a prenatal diagnostic procedure used to obtain fetal tissue for chromosomal analysis and genetic studies. The optimal timing for CVS is **11–13 weeks** of gestation. **Why 11–13 weeks is correct:** At this stage, the placenta (chorion frondosum) is sufficiently developed to provide an adequate tissue sample, and the gestational sac is large enough to be safely targeted under ultrasound guidance. Performing CVS during this window allows for early diagnosis of genetic abnormalities, providing the option for a safer first-trimester termination if required. **Why other options are incorrect:** * **6–8 weeks and 7–9 weeks (Options A & B):** These are considered "Early CVS." Performing the procedure before 10 weeks is strictly avoided due to a significant risk of **Limb Reduction Defects** (oromandibular-limb hypogenesis) caused by vascular disruption. * **9–11 weeks (Option C):** While technically possible after 10 weeks, the standard clinical practice and most guidelines (including ACOG and RCOG) favor the 11–13 week window to maximize safety and sample yield. **High-Yield Clinical Pearls for NEET-PG:** * **Route:** CVS can be performed **transabdominally** (most common) or **transcervically**. * **Advantage over Amniocentesis:** It provides a diagnosis earlier in pregnancy (Amniocentesis is typically done at 15–20 weeks). * **Risk of Pregnancy Loss:** Approximately 0.5–1%, which is slightly higher than or comparable to mid-trimester amniocentesis. * **Confined Placental Mosaicism:** A unique limitation of CVS where the chromosomal makeup of the placenta differs from the fetus, potentially leading to false positives. * **Rh-Negative Mothers:** Anti-D immunoglobulin must be administered post-procedure to prevent isoimmunization.

Practice by Chapter

Preconception Counseling

Practice Questions

Pregnancy Diagnosis and Dating

Practice Questions

Routine Antenatal Assessments

Practice Questions

Maternal Physiological Changes

Practice Questions

Nutrition in Pregnancy

Practice Questions

Screening Tests in Pregnancy

Practice Questions

Fetal Growth Assessment

Practice Questions

High-Risk Pregnancy Identification

Practice Questions

Antenatal Complications Management

Practice Questions

Psychosocial Aspects of Pregnancy

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free