Prenatal Care Practice Questions

Q: Chorionic villus sampling (CVS) performed at 9-10 weeks gestation is associated with an increased risk of which of the following complications?

Limb defects. **Explanation:** **Chorionic Villus Sampling (CVS)** is a prenatal diagnostic procedure typically performed between **10 and 13 weeks** of gestation. When performed earlier than this window (specifically before 9–10 weeks), it is strongly associated with **Limb Reduction Defects (LRD)**, such as oromandibular-limb hypogenesis. **1. Why Limb Defects?** The underlying mechanism is believed to be **vascular disruption**. Early instrumentation of the developing placenta can cause subchorionic hematomas or placental trauma, leading to distal limb ischemia and subsequent malformation. The risk is significantly higher when CVS is performed before 9 weeks; therefore, it is clinically recommended to wait until at least 10 weeks of gestation. **2. Analysis of Incorrect Options:** * **A. Neural Tube Defects (NTDs):** These are caused by failure of the neural tube to close (around week 4) and are associated with folic acid deficiency, not invasive procedures. * **B. Fetal Loss:** While CVS does carry a risk of miscarriage (approx. 0.5–1%), this risk is present regardless of the timing within the first trimester. Limb defects are the specific *teratogenic* complication associated with early timing (9-10 weeks). * **D. Vaginal Bleeding:** This is a common immediate side effect of transcervical CVS (occurring in ~10% of cases) but is considered a minor complication rather than a developmental malformation. **High-Yield Facts for NEET-PG:** * **Optimal Timing:** CVS (10–13 weeks) vs. Amniocentesis (15–20 weeks). * **Advantage of CVS:** Provides earlier diagnosis compared to amniocentesis, allowing for safer termination if needed. * **Disadvantage:** CVS cannot test for **Alpha-fetoprotein (AFP)**; therefore, it cannot diagnose Neural Tube Defects. * **Rh Isoimmunization:** Anti-D immunoglobulin must be administered to Rh-negative unsensitized women following the procedure.

Q: Supine hypotension is characteristic of which stage of pregnancy?

Third trimester. **Explanation:** **Supine Hypotension Syndrome** (also known as Aortocaval Compression) occurs when the gravid uterus compresses the **Inferior Vena Cava (IVC)** and the aorta while the patient is lying flat on her back. 1. **Why Third Trimester is Correct:** This phenomenon is most characteristic of the **third trimester** because the uterus has reached a sufficient size and weight (usually after 28 weeks) to physically obstruct venous return. Compression of the IVC leads to decreased preload, reduced cardiac output, and a subsequent drop in maternal blood pressure, causing symptoms like dizziness, nausea, and syncope. 2. **Analysis of Incorrect Options:** * **First Trimester:** The uterus is still a pelvic organ and is too small to compress the major abdominal vessels. * **Second Trimester:** While the uterus is growing, it rarely possesses enough mass to cause significant symptomatic compression in most singleton pregnancies until the very end of this period. * **Twin Pregnancy:** While a twin pregnancy increases the risk and severity of supine hypotension due to excessive uterine volume, the question asks for the **stage** of pregnancy. The physiological hallmark remains the third trimester, regardless of fetal number. **High-Yield NEET-PG Pearls:** * **Management:** The immediate treatment is the **Left Lateral Position**, which shifts the uterus off the IVC, restoring venous return. * **Aortic Compression:** While IVC compression causes maternal hypotension, compression of the **Aorta** can lead to reduced placental perfusion and fetal distress, even if maternal BP remains stable (Poseiro effect). * **Collateral Circulation:** In most women, the azygos vein and vertebral venous plexuses compensate for the obstruction, which is why only about 10% of pregnant women are clinically symptomatic.

Q: A 33-year-old woman presents with nausea and vomiting that has been worsening over the past 2 weeks, with two episodes of vomiting in the past 2 days. She also reports increased fatigue but denies abdominal pain or vaginal bleeding. Her past medical history includes occasional migraines, for which she takes acetaminophen as needed. She has no known drug allergies and no surgical history. Vital signs are stable. Examination reveals a bluish-appearing cervix on speculum examination, with a benign abdominal examination. Laboratory evaluation shows a positive urine hCG, leukocytes 9,000/mm3, hematocrit 41%, and platelets 250,000/mm3. Pelvic ultrasound demonstrates a gestational sac with a yolk sac and fetal pole surrounded by myometrium, with a fetal heart rate of 154 beats per minute. Which of the following is the MOST likely diagnosis?

Intrauterine pregnancy. **Explanation:** The patient presents with classic signs and symptoms of early pregnancy: amenorrhea, nausea, vomiting (morning sickness), fatigue, and a positive urine hCG. The physical examination finding of a **bluish-appearing cervix** is known as **Chadwick’s sign**, a presumptive sign of pregnancy caused by increased vascularity of the pelvic organs. The definitive diagnosis is confirmed via **pelvic ultrasound**, which shows a gestational sac, yolk sac, and fetal pole located within the **myometrium** (intrauterine) with a documented fetal heart rate. This confirms a viable **Intrauterine Pregnancy (IUP)**. **Analysis of Incorrect Options:** * **Appendicitis:** While nausea and vomiting occur, the absence of fever, leukocytosis, or right lower quadrant pain, combined with a benign abdominal exam and a confirmed IUP, makes this unlikely. * **Complete Hydatidiform Mole:** This usually presents with "snowstorm" appearance on ultrasound, abnormally high hCG levels, and the absence of a fetus or fetal heart rate. * **Ectopic Pregnancy:** Ultrasound would show an empty uterus and an adnexal mass. This patient’s ultrasound explicitly confirms the pregnancy is surrounded by myometrium (intrauterine). **NEET-PG Clinical Pearls:** * **Chadwick’s Sign:** Bluish discoloration of cervix/vagina (appears at ~6–8 weeks). * **Goodell’s Sign:** Softening of the cervix (appears at ~4–6 weeks). * **Ladin’s Sign:** Softening of the uterine midline (appears at ~6 weeks). * **Ultrasound Milestones:** Gestational sac is visible at 4.5–5 weeks; Yolk sac at 5–5.5 weeks; Fetal pole with cardiac activity at 6 weeks (transvaginal).

Q: A woman, 14 weeks pregnant, was exposed to chickenpox 2 days ago and has no history of chickenpox. What is the next step?

Test mother for antibodies against varicella. **Explanation:** The management of varicella exposure in pregnancy depends on the mother’s immune status. Varicella infection during pregnancy poses risks of maternal pneumonia and **Congenital Varicella Syndrome** (highest risk between 13–20 weeks). **1. Why Option D is Correct:** The first step in an exposed pregnant woman with a negative or uncertain history of chickenpox is to **test for Varicella-Zoster Virus (VZV) IgG antibodies**. Up to 80–90% of adults with an uncertain history are actually immune due to prior subclinical infection. If the IgG test is positive, the mother is immune, and no further action is required. **2. Why Other Options are Incorrect:** * **Option A & C:** The varicella vaccine is a **live-attenuated vaccine** and is strictly **contraindicated** during pregnancy due to the theoretical risk of transmission to the fetus. It should be given postpartum to non-immune women. * **Option B:** Varicella-Zoster Immunoglobulin (VZIG) is indicated only if the mother is confirmed to be **seronegative (IgG negative)**. Administering it before testing is not cost-effective and unnecessary if she is already immune. VZIG should ideally be given within 96 hours (up to 10 days) of exposure. **High-Yield Clinical Pearls for NEET-PG:** * **Incubation Period:** 10–21 days. * **Congenital Varicella Syndrome:** Characterized by skin scarring (cicatricial), limb hypoplasia, chorioretinitis, and microcephaly. * **Neonatal Varicella:** Occurs if the mother develops a rash 5 days before to 2 days after delivery. This is a medical emergency requiring VZIG for the newborn. * **Treatment:** If a pregnant woman develops the rash, oral **Acyclovir** is the drug of choice to reduce maternal complications.

Q: Which of the following statements regarding migraine in pregnancy is true?

NSAIDs are considered first-line drugs.. **Explanation:** **1. Why NSAIDs are the correct answer:** In the management of acute migraine during pregnancy, **NSAIDs (like Ibuprofen or Naproxen)** are considered first-line pharmacological agents, particularly during the first and second trimesters. They are effective for moderate to severe attacks when Acetaminophen (the initial drug of choice) fails. However, they must be avoided after **30-32 weeks of gestation** due to the risk of premature closure of the ductus arteriosus and oligohydramnios. **2. Analysis of Incorrect Options:** * **Option A (Ketorolac):** While an NSAID, Ketorolac is generally avoided in pregnancy due to its high potency and potential for increased fetal risks compared to Ibuprofen. * **Option C (Improvement of symptoms):** This is a common distractor. While many women experience relief due to stable estrogen levels, approximately **25% of women** see no change or even a worsening of symptoms. In the context of NEET-PG, the pharmacological "first-line" status of NSAIDs is a more definitive clinical fact than the variable clinical course of the disease. * **Option D (Sumatriptan vs. Chlorpromazine):** For severe refractory migraine (status migrainosus) in pregnancy, parenteral **metoclopramide or chlorpromazine** is often preferred over Triptans. Triptans are generally reserved as second-line therapy when other treatments fail. **3. High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (Initial):** Acetaminophen (Paracetamol). * **First-line (Moderate/Severe):** NSAIDs (up to 30 weeks). * **Prophylaxis:** If required, **Propranolol** is the drug of choice. * **Contraindicated:** Ergotamine and Dihydroergotamine (due to uterine contractions and fetal vasoconstriction). * **Red Flag:** New-onset headache in the second half of pregnancy must always be evaluated to rule out **Preeclampsia**.

Q: A 23-year-old female presents with a 5-week history of amenorrhea. Her pregnancy test is positive, and on examination, Palmer's sign is present. What does Palmer's sign indicate?

Rhythmic contraction of the uterus. **Explanation:** **Palmer’s sign** refers to the **rhythmic, regular, and painless contractions** of the uterus that can be felt during a bimanual examination as early as 4 to 8 weeks of gestation. These contractions are a result of increased uterine irritability and vascularity during early pregnancy. **Analysis of Options:** * **Option C (Correct):** Palmer’s sign is specifically defined as these early rhythmic contractions. It is one of the "probable" signs of pregnancy. * **Option A (Incorrect):** Pulsations felt in the lateral fornices due to increased vascularity is known as **Osiander’s sign**. * **Option B (Incorrect):** Softening of the uterine isthmus (the portion between the cervix and the body of the uterus) is known as **Hegar’s sign**. General softening of the cervix itself is called **Goodell’s sign**. * **Option D (Incorrect):** Bluish discoloration of the vagina and cervix due to venous congestion is known as **Chadwick’s sign** (or Jacquemier’s sign). **High-Yield Clinical Pearls for NEET-PG:** * **Timeline:** Palmer’s sign is typically detectable between **4–8 weeks** of gestation. * **Probable vs. Positive Signs:** Signs like Palmer’s, Hegar’s, and Chadwick’s are "probable" signs. "Positive" (diagnostic) signs include visualization of the fetus on ultrasound, fetal heart sound detection, and palpation of fetal movements by the clinician. * **Piskacek’s Sign:** Asymmetrical enlargement of the uterus if implantation occurs near one of the cornua.

Q: Supine hypotension is characteristic of which trimester of pregnancy?

Third trimester. **Explanation:** The correct answer is **C. Third trimester**. **1. Underlying Medical Concept:** Supine hypotension, also known as **Supine Hypotensive Syndrome** or **Aortocaval Compression**, occurs when the gravid uterus compresses the **Inferior Vena Cava (IVC)** and, to a lesser extent, the aorta when the mother lies flat on her back. This compression reduces venous return to the heart (preload), leading to a fall in cardiac output and a subsequent drop in maternal blood pressure. This phenomenon is most prominent in the **third trimester** because the uterus has reached a sufficient size and weight (usually after 28 weeks) to exert significant mechanical pressure on the retroperitoneal vessels. **2. Analysis of Incorrect Options:** * **A & B (First and Second Trimesters):** In the first trimester, the uterus is a pelvic organ. In the early second trimester, though it becomes an abdominal organ, it is not heavy enough to cause significant IVC compression. * **D (Twin Pregnancy):** While supine hypotension is more severe in twin pregnancies due to increased uterine volume, it is not a "trimester." The question asks for the specific period of pregnancy where this is characteristic; even in twins, the effect is most pronounced during the third trimester. **3. NEET-PG High-Yield Pearls:** * **Clinical Presentation:** Maternal dizziness, pallor, tachycardia, and nausea when supine. * **Management:** Immediate relief is obtained by the **Left Lateral Position**, which shifts the uterus off the IVC. * **Fetal Impact:** Prolonged supine hypotension can lead to reduced uteroplacental perfusion and fetal distress. * **Surgical Note:** During Cesarean sections, a "wedge" is placed under the right hip to tilt the patient 15° to the left to prevent this syndrome during anesthesia.

Q: What is the typical level of fibrinogen in a full-term pregnancy at term?

300-600 mg/dL. ### Explanation **Correct Answer: B. 300-600 mg/dL** **1. Why Option B is Correct:** Pregnancy is a **hypercoagulable state** characterized by an increase in most clotting factors and a decrease in natural anticoagulants. Fibrinogen (Factor I) undergoes a significant increase due to estrogen-mediated hepatic synthesis. While the non-pregnant level of fibrinogen is typically **200–400 mg/dL**, it rises by approximately 50% during pregnancy, reaching levels of **300–600 mg/dL** at term. This physiological adaptation serves as a protective mechanism to minimize blood loss during the placental separation phase of delivery. **2. Why Other Options are Incorrect:** * **Option A (200-400 mg/dL):** This represents the **normal range for a non-pregnant adult**. In the context of pregnancy, a fibrinogen level of 200 mg/dL is considered abnormally low and may indicate a state of consumptive coagulopathy (e.g., DIC). * **Option C (150-200 mg/dL):** These levels are subnormal even for non-pregnant individuals. In an obstetric emergency like Abruptio Placentae, a level below 150 mg/dL is a critical warning sign of severe depletion. **3. High-Yield Clinical Pearls for NEET-PG:** * **Hypercoagulability:** Pregnancy increases Factors VII, VIII, IX, X, and Fibrinogen. Factors **XI and XIII actually decrease**. * **ESR:** Due to the rise in fibrinogen (which increases RBC sedimentation), the **ESR is physiologically elevated** in pregnancy and cannot be used as a reliable marker for infection. * **Critical Value:** In cases of Postpartum Hemorrhage (PPH) or Abruption, a fibrinogen level **<200 mg/dL** is highly predictive of severe hemorrhage and the need for blood products (Cryoprecipitate). * **Protein S:** Levels of free and total Protein S **decrease**, further contributing to the prothrombotic state.

Q: What is the best gestational age to perform a single ultrasound scan during pregnancy?

18-22 weeks. **Explanation:** The **18–22 week scan**, commonly known as the **Anomaly Scan** or **Level II Ultrasound**, is considered the most critical single scan in pregnancy. At this gestational age, fetal anatomy is sufficiently developed to be visualized in detail, yet the fetus is small enough and the amniotic fluid volume is optimal to allow for clear imaging. This window is the "gold standard" for detecting major structural congenital anomalies (e.g., neural tube defects, cardiac malformations). **Analysis of Options:** * **A & B (6–12 weeks):** While early scans are excellent for confirming viability, dating (via Crown-Rump Length), and screening for chromosomal markers (like Nuchal Translucency at 11–13.6 weeks), the organs are not yet fully developed for a comprehensive structural survey. * **D (34–36 weeks):** Late third-trimester scans are primarily used for assessing fetal growth, placental position, and liquor volume. However, increased fetal size and bone mineralization at this stage make a detailed anatomical survey difficult. **High-Yield NEET-PG Pearls:** * **Best time for Dating:** 7–12 weeks (CRL is the most accurate parameter for gestational age). * **Best time for NT Scan:** 11 weeks to 13 weeks 6 days. * **Legal Limit for MTP (India):** The Medical Termination of Pregnancy (Amendment) Act 2021 allows termination up to **24 weeks** for specific categories (including fetal anomalies), making the 18–22 week scan legally crucial for decision-making. * **Cervical Length:** Also measured during the 18–22 week scan to screen for risk of preterm labor.

Question 1

Chorionic villus sampling (CVS) performed at 9-10 weeks gestation is associated with an increased risk of which of the following complications?

Accepted Answer

Limb defects

Answer

Neural tube defects

Answer

Fetal loss

Answer

Vaginal bleeding

Question 2

Supine hypotension is characteristic of which stage of pregnancy?

Accepted Answer

Third trimester

Answer

First trimester

Answer

Second trimester

Answer

Twin pregnancy

Question 3

A 33-year-old woman presents with nausea and vomiting that has been worsening over the past 2 weeks, with two episodes of vomiting in the past 2 days. She also reports increased fatigue but denies abdominal pain or vaginal bleeding. Her past medical history includes occasional migraines, for which she takes acetaminophen as needed. She has no known drug allergies and no surgical history. Vital signs are stable. Examination reveals a bluish-appearing cervix on speculum examination, with a benign abdominal examination. Laboratory evaluation shows a positive urine hCG, leukocytes 9,000/mm3, hematocrit 41%, and platelets 250,000/mm3. Pelvic ultrasound demonstrates a gestational sac with a yolk sac and fetal pole surrounded by myometrium, with a fetal heart rate of 154 beats per minute. Which of the following is the MOST likely diagnosis?

Accepted Answer

Intrauterine pregnancy

Answer

Appendicitis

Answer

Complete hydatidiform mole

Answer

Ectopic pregnancy

Question 4

A woman, 14 weeks pregnant, was exposed to chickenpox 2 days ago and has no history of chickenpox. What is the next step?

Accepted Answer

Test mother for antibodies against varicella

Answer

Administer varicella vaccine

Answer

Administer varicella immunoglobulin

Answer

Administer varicella immunoglobulin and vaccine

Question 5

Which of the following statements regarding migraine in pregnancy is true?

Accepted Answer

NSAIDs are considered first-line drugs.

Answer

Ketorolac is the preferred treatment.

Answer

Migraine symptoms typically improve during pregnancy.

Answer

Sumatriptan is preferred over chlorpromazine.

Question 6

A 23-year-old female presents with a 5-week history of amenorrhea. Her pregnancy test is positive, and on examination, Palmer's sign is present. What does Palmer's sign indicate?

Accepted Answer

Rhythmic contraction of the uterus

Answer

Pulsation in the lateral fornix

Answer

Softening of the uterus

Answer

Bluish coloration of the vagina

Question 7

Supine hypotension is characteristic of which trimester of pregnancy?

Accepted Answer

Third trimester

Answer

First trimester

Answer

Second trimester

Answer

Twin pregnancy

Question 8

What is the typical level of fibrinogen in a full-term pregnancy at term?

Accepted Answer

300-600 mg/dL

Answer

200-400 mg/dL

Answer

150-200 mg/dL

Answer

None of these

Question 9

What is the best gestational age to perform a single ultrasound scan during pregnancy?

Accepted Answer

18-22 weeks

Answer

6-8 weeks

Answer

10-12 weeks

Answer

34-36 weeks

Question 10

Which of the following is NOT related to uterine souffle?

Accepted Answer

It is due to increased blood flow through the placental site.

Answer

It is a soft blowing systolic murmur heard on the sides of the pregnant uterus.

Answer

The sound is synchronous with the maternal pulse.

Answer

It can be heard even in a large fibroid.

Prenatal Care — MCQs

Prenatal Care — MCQs

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