Prenatal Care Practice Questions

Q: A gravida 2 with 1 normal live birth has presented to the clinic with a transverse lie at 36 weeks gestation. What should be the next step of management in this patient?

External cephalic version. ### Explanation **Correct Option: A. External Cephalic Version (ECV)** In a multigravida (G2P1) at 36 weeks gestation with a transverse lie, the management of choice is **External Cephalic Version (ECV)**. At 36 weeks, the fetus is near term, but there is still sufficient amniotic fluid and uterine space to attempt manual rotation of the fetus into a cephalic presentation through the maternal abdominal wall. In multigravidas, the success rate of ECV is higher (approx. 60%) compared to primigravidas due to increased uterine laxity. **Why other options are incorrect:** * **B. Internal Cephalic Version:** This is an intrauterine procedure performed only during the second stage of labor, specifically for the delivery of the **second twin** in a twin pregnancy. It is contraindicated in singleton pregnancies due to high risks of uterine rupture and fetal trauma. * **C. Cesarean Section:** While a persistent transverse lie at term (39 weeks) or in labor requires a C-section, it is not the *immediate* next step at 36 weeks if there are no contraindications to ECV. * **D. Wait and Watch:** While spontaneous version can occur, 36 weeks is the standard window to intervene with ECV to prevent the risks associated with transverse lie (e.g., premature rupture of membranes and cord prolapse). **Clinical Pearls for NEET-PG:** * **Timing of ECV:** Usually performed at **36 weeks in primigravidas** and **37 weeks in multigravidas** (to minimize the risk of preterm labor while maximizing success). * **Prerequisites for ECV:** Reactive NST, adequate liquor (AFI >5), and no placenta previa. * **Most common cause of Transverse Lie:** In multiparous women, it is **pendulous abdomen/lax abdominal wall**. In primigravidas, always suspect **placenta previa** or pelvic contraction. * **Management at Term:** If ECV fails or is contraindicated, an elective Cesarean section is performed at 38–39 weeks.

Q: What does Goodell's sign indicate?

Softening of the cervix from the lower part upwards. **Explanation:** **Goodell’s Sign** is a clinical indicator of pregnancy characterized by the **softening of the cervix**. Under the influence of increased estrogen and progesterone, there is marked vascularity, congestion, and edema of the cervical tissues. This causes the cervix, which normally feels like the "tip of the nose" in a non-pregnant state, to feel as soft as the "lips of the mouth" or "earlobe" starting from the 6th week of gestation. The softening typically progresses from the lower part upwards. **Analysis of Options:** * **Option A (Pulsation in the lateral vaginal fornix):** This describes **Osiander’s sign**, caused by increased vascularity and pulsation of the uterine arteries felt through the lateral fornices around the 8th week. * **Option B (Bluish discoloration of the vagina):** This describes **Chadwick’s sign** (or Jacquemier’s sign), resulting from pelvic congestion and venous stasis, typically visible by the 6th–8th week. * **Option D (Approximation of fingers on bimanual palpation):** This describes **Hegar’s sign**. Due to the softening of the isthmus (the lower uterine segment), the upper body of the uterus and the cervix feel like two separate entities, allowing the fingers to nearly meet during a bimanual exam. **High-Yield Clinical Pearls for NEET-PG:** 1. **Timeline:** Most presumptive/probable signs of pregnancy (Goodell’s, Chadwick’s, Hegar’s) appear between **6–10 weeks**. 2. **Palmer’s Sign:** Regular, rhythmic uterine contractions felt during a bimanual examination as early as 4–8 weeks. 3. **Ladin’s Sign:** Softening of the anterior midline of the uterus at the cervico-uterine junction (6th week). 4. **Piskacek’s Sign:** Asymmetrical enlargement of the uterus if implantation occurs near one of the cornua.

Q: To obtain true conjugate, what factor should be subtracted from the diagonal conjugate?

2.0 cm. ### Explanation The **True Conjugate** (Anatomic Conjugate) is the shortest anteroposterior diameter of the pelvic inlet, measured from the upper margin of the pubic symphysis to the center of the sacral promontory [1]. It is a critical measurement in obstetrics to determine if the pelvic inlet is adequate for vaginal delivery. **Why 2.0 cm is correct:** In clinical practice, the True Conjugate cannot be measured directly during a physical exam because the pubic symphysis is in the way. Instead, clinicians measure the **Diagonal Conjugate**—the distance from the lower border of the pubic symphysis to the sacral promontory—via a vaginal examination. To estimate the True Conjugate, one must subtract approximately **1.5 to 2.0 cm** from the Diagonal Conjugate [1]. In the context of standard medical examinations like NEET-PG, **2.0 cm** is the traditionally accepted value for this calculation. **Analysis of Incorrect Options:** * **A (0.5 cm):** This value is too small and does not account for the thickness and angulation of the pubic bone. * **C (2.5 cm) & D (3.0 cm):** These values are too large. Subtracting this much would underestimate the pelvic capacity, potentially leading to unnecessary surgical interventions. **High-Yield Clinical Pearls for NEET-PG:** * **Obstetric Conjugate:** This is the shortest diameter through which the fetal head must pass. It is measured from the *posterior* surface of the pubic symphysis to the sacral promontory. It is calculated by subtracting **1.5 cm** from the Diagonal Conjugate [1]. * **Normal Values:** * Diagonal Conjugate: ~12.5 cm (The only one measurable clinically). * True Conjugate: ~11.0 cm. * Obstetric Conjugate: ~10.5 cm. * **Clinical Tip:** If a clinician can easily touch the sacral promontory during a vaginal exam, the pelvis may be contracted (narrow).

Q: Which diagnostic method is best for detecting neural tube defects?

Amniocentesis. **Explanation:** The detection of Neural Tube Defects (NTDs) relies on identifying elevated levels of **Alpha-fetoprotein (AFP)** and the presence of **Acetylcholinesterase (AChE)**. **Why Amniocentesis is the Correct Answer:** While maternal serum AFP (MSAFP) is a common screening tool, **amniocentesis** is considered the gold standard diagnostic method. It allows for the measurement of **Amniotic Fluid AFP (AFAFP)**. If AFAFP is elevated, the sample is tested for **Acetylcholinesterase (AChE)**. AChE is highly specific; its presence in amniotic fluid confirms an open NTD (like anencephaly or spina bifida) because this enzyme leaks directly from exposed neural tissue into the amniotic sac. **Analysis of Incorrect Options:** * **A. Ultrasound (USG):** While high-resolution (Level II) ultrasound is excellent for visualizing structural defects (e.g., "lemon sign" or "banana sign"), it is operator-dependent. Amniocentesis provides definitive biochemical confirmation. * **B. Chromosomal analysis:** NTDs are primarily structural/multifactorial defects, not typically caused by numerical or structural chromosomal aberrations (like Trisomy 21). * **D. Placentography:** This is an obsolete technique formerly used to visualize the placenta; it has no role in diagnosing fetal structural anomalies. **NEET-PG High-Yield Pearls:** * **Best Screening Test:** Maternal Serum AFP (done at 15–20 weeks). * **Most Specific Diagnostic Marker:** Acetylcholinesterase (AChE) in amniotic fluid. * **Prevention:** 400 mcg/day of Folic Acid (pre-conceptionally) reduces NTD risk by 70%. For women with a previous history of NTD, the dose is increased to **4 mg/day**. * **Anencephaly:** The most common NTD; associated with polyhydramnios due to failure of the fetal swallowing reflex.

Q: Which of the following is NOT a normal physiological finding in pregnancy?

Diastolic murmur. In pregnancy, the cardiovascular system undergoes significant remodeling to meet increased metabolic demands. Understanding the distinction between physiological adaptations and pathological signs is crucial for NEET-PG. ### **Why Diastolic Murmur is the Correct Answer** A **diastolic murmur is always pathological** in pregnancy. While pregnancy is a hyperdynamic state characterized by increased cardiac output (up to 50%) and stroke volume, these changes typically manifest as systolic flow murmurs. A diastolic murmur suggests underlying structural heart disease, such as mitral stenosis or aortic regurgitation, and warrants immediate investigation with an echocardiogram. ### **Analysis of Incorrect Options** * **A. Dyspnea:** Physiological dyspnea occurs in about 75% of pregnant women. It is primarily due to increased progesterone levels, which increase the sensitivity of the respiratory center to $CO_2$, leading to "hyperventilation of pregnancy." * **B. Systolic Murmur:** Up to 90% of pregnant women develop a **Grade I or II midsystolic flow murmur**. This is caused by decreased blood viscosity (hemodilution) and increased flow velocity across the pulmonary and aortic valves. * **D. Exercise Intolerance:** This is a normal finding due to the increased mechanical load of the gravid uterus, increased basal metabolic rate, and the physiological shift in the center of gravity. ### **High-Yield Clinical Pearls for NEET-PG** * **Heart Sounds:** An exaggerated S1 split and a physiological S3 are common/normal in pregnancy. * **ECG Changes:** Left axis deviation is common as the diaphragm elevates and displaces the heart upward and to the left. * **Blood Pressure:** Diastolic BP decreases in the first and second trimesters (nadir at 24 weeks) due to decreased Systemic Vascular Resistance (SVR). * **Rule of Thumb:** Systolic = Flow (Normal); Diastolic = Disease (Abnormal).

Q: A 32-week pregnant primigravida presents with dyspnea. Her hemoglobin is 10 mg%. What is the minimum hemoglobin level in pregnancy below which anemia can be diagnosed?

11 mg%. ### Explanation **1. Understanding the Correct Answer (C: 11 mg%)** In pregnancy, there is a physiological increase in both plasma volume (approx. 50%) and red cell mass (approx. 20-30%). Because the plasma volume expansion exceeds the increase in red cell mass, a state of **hemodilution** occurs, often referred to as "physiological anemia of pregnancy." According to the **World Health Organization (WHO)** and the **CDC**, anemia in pregnancy is defined as a Hemoglobin (Hb) level **< 11 g/dL** (or 11 mg% as per the question's units). This threshold is lower than the non-pregnant female cutoff (12 g/dL) to account for this normal physiological expansion. **2. Analysis of Incorrect Options** * **A (9 mg%):** This represents moderate anemia. While common in clinical practice, it is well below the diagnostic threshold. * **B (10 mg%):** This is the threshold used by the **ICMR (Indian Council of Medical Research)** to define anemia in the Indian context for public health purposes, but the standard WHO diagnostic criteria used in exams remains 11 g/dL. * **D (12 mg%):** This is the cutoff for anemia in **non-pregnant** adult females. **3. NEET-PG High-Yield Pearls** * **WHO Classification of Anemia in Pregnancy:** * **Mild:** 10 – 10.9 g/dL * **Moderate:** 7 – 9.9 g/dL * **Severe:** < 7 g/dL * **Very Severe:** < 4 g/dL (Medical emergency) * **Timing:** Hemodilution is maximum at **30–32 weeks** of gestation, which is why patients often present with symptoms like dyspnea during this period. * **Prophylaxis:** Under the *Anemia Mukt Bharat* guidelines, pregnant women should receive **60 mg elemental iron and 500 µg folic acid** daily for 180 days, starting from the second trimester.

Q: What is the first symptom of pregnancy?

Amenorrhea. **Explanation:** **Amenorrhea** (cessation of menses) is considered the **first and most common symptom** of pregnancy in a woman of reproductive age with previously regular cycles. This occurs because the corpus luteum continues to produce progesterone following fertilization, preventing the shedding of the endometrial lining. While it is a highly sensitive indicator, it is not diagnostic, as it can be caused by stress, endocrinopathies, or systemic illness. **Analysis of Incorrect Options:** * **Tingling in the breasts:** Breast changes (heaviness, tingling, and tenderness) are early signs caused by rising estrogen and progesterone levels, typically appearing around **4–6 weeks** of gestation, usually after the missed period. * **Morning sickness:** Nausea and vomiting generally start around the **6th week** of gestation and peak by the 9th week. It is mediated by the rapid rise in Human Chorionic Gonadotropin (hCG) levels. * **Quickening:** This refers to the first perception of fetal movements by the mother. It occurs much later—around **18–20 weeks** in primigravida and **16–18 weeks** in multigravida. **Clinical Pearls for NEET-PG:** * **Presumptive signs:** Subjective symptoms like amenorrhea, fatigue, and breast changes. * **Probable signs:** Objective findings like **Hegar’s sign** (softening of the isthmus) and **Chadwick’s sign** (bluish discoloration of the cervix/vagina). * **Positive signs:** Diagnostic findings like fetal heart sounds (Doppler at 10–12 weeks) and visualization of the fetus on USG (Gestational sac at 4.5–5 weeks). * **Rule of thumb:** In any woman of reproductive age presenting with sudden onset amenorrhea, pregnancy must be ruled out first.

Q: What is the commonest cause of first-trimester abortion?

Trisomy. **Explanation:** Spontaneous abortion in the first trimester is most frequently attributed to genetic abnormalities, which account for approximately 50-60% of early pregnancy losses. **1. Why Trisomy is the Correct Answer:** Among all chromosomal abnormalities leading to first-trimester miscarriage, **Autosomal Trisomy** is the single most common category, representing about 50% of all karyotypically abnormal abortuses. Specifically, **Trisomy 16** is the most frequent individual trisomy observed, though it is never seen in live births. **2. Analysis of Incorrect Options:** * **Aneuploidy (Option D):** While aneuploidy (an abnormal number of chromosomes) is the broad category that includes trisomies and monosomies, in the context of NEET-PG questions, examiners look for the most specific "commonest" subtype. Since trisomies form the largest bulk of aneuploidies, **Trisomy** is the preferred specific answer. * **Monosomy (Option A):** **Monosomy X (45,X or Turner Syndrome)** is the most common *single* specific chromosomal abnormality found in spontaneous abortions (approx. 20%). However, as a group, trisomies are more frequent than monosomies. * **Triploidy (Option C):** This is a form of polyploidy (69 chromosomes) often associated with hydatidiform moles. While significant, it is less common than autosomal trisomies. **High-Yield Clinical Pearls for NEET-PG:** * **Most common overall cause of 1st-trimester abortion:** Genetic factors (Chromosomal anomalies). * **Most common chromosomal anomaly:** Autosomal Trisomy. * **Most common specific Trisomy:** Trisomy 16. * **Most common specific karyotype abnormality:** 45,X (Monosomy X). * **Most common cause of 2nd-trimester abortion:** Maternal factors (e.g., Cervical incompetence, uterine anomalies).

Question 1

A gravida 2 with 1 normal live birth has presented to the clinic with a transverse lie at 36 weeks gestation. What should be the next step of management in this patient?

Accepted Answer

External cephalic version

Answer

Internal cephalic version

Answer

Cesarean section

Answer

Wait and watch

Question 2

What does Goodell's sign indicate?

Accepted Answer

Softening of the cervix from the lower part upwards

Answer

Pulsation in the lateral vaginal fornix

Answer

Bluish discoloration of the vagina

Answer

On bimanual palpation, the fingers can be approximated, as if nothing is in between

Question 3

To obtain true conjugate, what factor should be subtracted from the diagonal conjugate?

Accepted Answer

2.0 cm

Answer

0.5 cm

Answer

2.5 cm

Answer

3.0 cm

Question 4

Which diagnostic method is best for detecting neural tube defects?

Accepted Answer

Amniocentesis

Answer

Ultrasound (USG)

Answer

Chromosomal analysis

Answer

Placentography

Question 5

Which of the following is NOT a normal physiological finding in pregnancy?

Accepted Answer

Diastolic murmur

Answer

Dyspnea

Answer

Systolic murmur

Answer

Exercise intolerance

Question 6

A 26-year-old G1P0 in her 16th week of gestation had a quad screen that suggested a 1:50 risk for Down syndrome. An ultrasound places the fetus at 15 weeks and 5 days gestation. What is the recommended next step in counseling?

Accepted Answer

The patient should undergo amniocentesis now.

Answer

The quad screen was drawn too early.

Answer

It is safe to wait until 22 weeks for amniocentesis.

Answer

The patient should consider termination as an option due to the abnormal quad screen.

Question 7

A 32-week pregnant primigravida presents with dyspnea. Her hemoglobin is 10 mg%. What is the minimum hemoglobin level in pregnancy below which anemia can be diagnosed?

Accepted Answer

11 mg%

Answer

9 mg%

Answer

10 mg%

Answer

12 mg%

Question 8

What is the drug of choice for bacterial vaginosis in a pregnant female?

Accepted Answer

Metronidazole

Answer

Clindamycin

Answer

Erythromycin

Answer

Fluconazole

Question 9

What is the first symptom of pregnancy?

Accepted Answer

Amenorrhea

Answer

Tingling in the breasts

Answer

Morning sickness

Answer

Quickening

Question 10

What is the commonest cause of first-trimester abortion?

Accepted Answer

Trisomy

Answer

Monosomy

Answer

Triploidy

Answer

Aneuploidy

Prenatal Care — MCQs

Prenatal Care — MCQs

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