Labor and Delivery — MCQs

A 30-year-old G5 P3 A1 presents to the OPD in an exhausted state with labor pains for 12 hours and a history of drainage of liquor 10 hours prior. Examination reveals a pulse of 96/min, a dry and coated tongue, good uterine contractions, and absent fetal heart sounds. Pelvic examination shows a term pregnancy, a thick cervix dilated 6-7 cm, absent membranes, a large caput, and a presenting part station of +3. What is the most likely diagnosis?

Q95Easy

Which of the following has proven to be effective in the management of preeclampsia?

Q96Medium

What is the pH value in capillary scalp blood that indicates serious fetal distress requiring emergency intervention?

Q97Easy

An absolute indication of Cesarean Section is?

Q98Easy

Which of the following is used for controlling convulsions in an eclamptic patient?

Q99Easy

What is the most common type of breech presentation at term?

Q100Medium

A 26-year-old female at 39 weeks gestation presents with a gush of fluid and regular contractions. On examination, her membranes are ruptured, contractions occur every two minutes, and cervical dilatation is 4 cm. The fetal heart rate is 140/min and reactive. She was admitted for labor and delivery. Over the next four hours, cervical dilatation progressed to 9 cm. In the past hour, the fetal heart rate increased from a baseline of 140/min to 160/min, and moderate to severe variable decelerations are seen with each contraction. The fetal heart rate does not respond to scalp stimulation. A cesarean section was decided. What is the most important reason for this decision?

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 91: What is the most common cause of abortion in the first trimester?

A. Trisomy (Correct Answer)
B. Triploidy
C. Cervical incompetence
D. Antiphospholipid syndrome

Explanation: **Explanation:** Spontaneous abortion (miscarriage) occurs in approximately 10–15% of clinically recognized pregnancies. Genetic factors are the most significant cause, accounting for nearly 50–60% of first-trimester losses. **1. Why Trisomy is Correct:** Chromosomal abnormalities are the leading cause of early pregnancy loss. Among these, **Autosomal Trisomy** is the most common specific category, accounting for about 50% of all chromosomally abnormal abortuses. Specifically, **Trisomy 16** is the most frequent trisomy observed in miscarriages (though it is never seen in live births). **2. Analysis of Incorrect Options:** * **Triploidy (Option B):** While a significant cause of polyploidy, it is less frequent than autosomal trisomy. It often results from dispermy (fertilization of one egg by two sperm). * **Cervical Incompetence (Option C):** This is a classic cause of **second-trimester** (mid-trimester) habitual abortions, characterized by painless cervical dilatation and membrane prolapse, rather than first-trimester loss. * **Antiphospholipid Syndrome (Option D):** APS is an important acquired autoimmune cause of recurrent pregnancy loss, but it is statistically far less common than random genetic aneuploidy in the general population. **Clinical Pearls for NEET-PG:** * **Most common single chromosomal anomaly:** Monosomy X (Turner Syndrome, 45,X). * **Most common group of anomalies:** Autosomal Trisomy. * **Most common specific Trisomy:** Trisomy 16. * **Most common Trisomy in live births:** Trisomy 21 (Down Syndrome). * **Timing:** Most "genetic" abortions occur before 8 weeks of gestation.

Question 92: In threatened abortion, what is the expected size of the uterus?

A. Smaller than expected
B. Larger than expected
C. Corresponds to duration of amenorrhea (Correct Answer)
D. None of the above

Explanation: In **threatened abortion**, the pregnancy is still viable, and the products of conception remain entirely within the uterine cavity. Because the fetus and gestational sac are intact and continuing to develop, the **uterine size corresponds to the period of amenorrhea (POA)**. ### **Explanation of Options:** * **Option C (Correct):** In threatened abortion, the internal os is closed, and there is no expulsion of tissue. Therefore, the uterine volume reflects the actual gestational age. * **Option A (Incorrect):** A uterus **smaller than the POA** is characteristic of **Inevitable, Incomplete, or Missed abortions**. In these cases, the products of conception have either been partially expelled or have ceased growing (maceration/liquefaction), leading to a decrease in uterine volume. * **Option B (Incorrect):** A uterus **larger than the POA** suggests conditions like **Molar pregnancy (Hydatidiform mole)**, multiple gestations, or a pregnancy complicated by large fibroids. ### **NEET-PG High-Yield Pearls:** 1. **Clinical Triad:** Threatened abortion presents with painless (or mild cramping) vaginal bleeding, a **closed internal os**, and a uterine size that matches the dates. 2. **Prognosis:** Approximately 50% of threatened abortions proceed to a normal pregnancy. 3. **Management:** The mainstay of treatment is **bed rest** (though evidence is limited) and reassurance. Progesterone supplementation is often used if a deficiency is suspected. 4. **USG Finding:** The presence of fetal heart activity on ultrasound is the most important prognostic factor for viability.

Question 93: For which presentation is an assisted breech delivery indicated?

A. Extended breech
B. Complete breech
C. Fetal weight less than 2 kg with a history of two previous successful breech deliveries
D. All of the above (Correct Answer)

Explanation: **Explanation:** Assisted breech delivery is a technique where the baby is allowed to deliver spontaneously up to the level of the umbilicus, after which the obstetrician assists in the delivery of the shoulders and the after-coming head. **Why Option D is correct:** The decision for a vaginal breech delivery depends on the type of breech, fetal weight, and maternal history. * **Extended Breech (Frank Breech):** This is the most favorable presentation for vaginal delivery because the extended legs act as a splint, and the firm buttocks provide an efficient dilating wedge for the cervix. * **Complete Breech:** This is also acceptable for vaginal delivery, provided there is no footling component (which increases the risk of cord prolapse). * **Fetal Weight and Parity:** While a weight between 2.5 kg and 3.5 kg is ideal, a weight slightly below 2 kg in a **multiparous woman** with a proven pelvis (history of successful breech deliveries) is a clinical scenario where assisted delivery can be safely considered, as the birth canal has been previously "tested." **Analysis of Options:** * **Options A and B** are standard indications for trial of vaginal breech delivery. * **Option C** highlights that parity and previous obstetric history are crucial modifiers in choosing the route of delivery. **Clinical Pearls for NEET-PG:** * **Prerequisites for Vaginal Breech:** Average pelvis (gynecoid), frank/complete breech, fetal weight 2.5–3.5 kg, and a flexed fetal head (diagnosed via USG to rule out "stargazer fetus"). * **Burn-Marshall Maneuver:** Used for delivery of the after-coming head by swinging the baby's body towards the mother's abdomen. * **Mauriceau-Smellie-Veit Maneuver:** The gold standard for delivering the after-coming head (promotes flexion). * **Pinard’s Maneuver:** Used to bring down the legs in an extended breech. * **Løvset Maneuver:** Used for delivery of the arms/shoulders by rotation of the trunk.

Question 94: A 30-year-old G5 P3 A1 presents to the OPD in an exhausted state with labor pains for 12 hours and a history of drainage of liquor 10 hours prior. Examination reveals a pulse of 96/min, a dry and coated tongue, good uterine contractions, and absent fetal heart sounds. Pelvic examination shows a term pregnancy, a thick cervix dilated 6-7 cm, absent membranes, a large caput, and a presenting part station of +3. What is the most likely diagnosis?

A. Normal labor findings
B. Prolonged labor
C. Obstructed labor (Correct Answer)
D. Abnormal uterine action

Explanation: ### Explanation The clinical presentation is a classic case of **Obstructed Labor**. The diagnosis is established by the presence of maternal exhaustion (dry, coated tongue, tachycardia) and signs of mechanical arrest despite "good uterine contractions." **Why Obstructed Labor is correct:** In obstructed labor, the fetus cannot descend through the birth canal despite adequate contractions. Key diagnostic features present in this patient include: 1. **Maternal Distress:** Dehydration (dry tongue) and exhaustion from prolonged effort. 2. **Fetal Demise:** Absent fetal heart sounds (FHS) are common in late-stage obstruction due to placental insufficiency or uterine rupture. 3. **Physical Signs:** A **large caput succedaneum** and significant molding occur as the head is squeezed against the pelvis. 4. **Station Paradox:** While the station is +3, in obstructed labor, this is often a "false station" caused by the massive caput, while the actual hard part of the head remains high. **Why other options are incorrect:** * **Normal labor findings:** The presence of maternal exhaustion, absent FHS, and a 12-hour duration with no progress are pathological. * **Prolonged labor:** This refers to labor lasting >18–24 hours. While this labor is prolonged, the specific signs of "obstruction" (caput, maternal exhaustion, fetal death) make "Obstructed Labor" the more specific and clinically accurate diagnosis. * **Abnormal uterine action:** The question states there are "good uterine contractions," ruling out hypotonic or incoordinate uterine dysfunction. **Clinical Pearls for NEET-PG:** * **Bandl’s Ring:** A pathognomonic sign of obstructed labor; it is a pathological retraction ring seen at the junction of the upper and lower uterine segments. * **Management:** Obstructed labor with a dead fetus is usually managed by **Decapitation/Craniotomy** (if conditions are favorable) or **Cesarean Section** (if the uterus is nearing rupture). * **Triad of Obstruction:** Maternal exhaustion + Good contractions + No descent of the presenting part.

Question 95: Which of the following has proven to be effective in the management of preeclampsia?

A. Zinc
B. Calcium (Correct Answer)
C. Magnesium
D. None

Explanation: **Explanation:** The correct answer is **Calcium**. The management of preeclampsia involves two distinct strategies: **prevention** (prophylaxis) and **treatment** of complications. 1. **Why Calcium is correct:** According to WHO and ACOG guidelines, calcium supplementation (1.5–2.0 g/day) is proven to **reduce the risk of developing preeclampsia**, particularly in populations with low dietary calcium intake. The underlying mechanism involves the suppression of parathyroid hormone release and intracellular calcium reduction, which decreases vascular smooth muscle reactivity and prevents hypertension. 2. **Why other options are incorrect:** * **Magnesium:** While **Magnesium Sulfate (MgSO₄)** is the drug of choice for the *prevention and treatment of seizures* (eclampsia), it does not prevent the onset of preeclampsia itself. The question asks for the management of the condition broadly; in the context of nutritional/preventative interventions, calcium has the strongest evidence base. * **Zinc:** Various studies have evaluated antioxidants and minerals like Zinc, Vitamin C, and Vitamin E. However, clinical trials have failed to show any significant benefit in the prevention or management of preeclampsia. **High-Yield Clinical Pearls for NEET-PG:** * **Low-dose Aspirin (75–150 mg):** The most effective pharmacological intervention for preventing preeclampsia in high-risk women, ideally started before 16 weeks of gestation. * **Definitive Treatment:** Delivery of the fetus and placenta remains the only definitive cure for preeclampsia. * **Antihypertensives of choice:** Labetalol (first line), Hydralazine, and Nifedipine. **ACE inhibitors and ARBs are contraindicated** due to teratogenicity.

Question 96: What is the pH value in capillary scalp blood that indicates serious fetal distress requiring emergency intervention?

A. < 7.2 (Correct Answer)
B. > 7.4
C. > 7.1
D. None of the above

Explanation: **Explanation:** Fetal Scalp Blood Sampling (FBS) is a diagnostic tool used to assess fetal acid-base status when electronic fetal monitoring (CTG) shows non-reassuring patterns. The pH of fetal blood is a direct indicator of hypoxia and metabolic acidosis. **1. Why < 7.2 is correct:** A normal fetal scalp pH is typically **> 7.25**. * **pH 7.20 – 7.25:** Classified as "Pre-pathological" or "Borderline." This requires a repeat sample within 30–60 minutes to monitor the trend. * **pH < 7.20:** Classified as "Pathological" (Acidosis). This indicates significant fetal distress and is a definitive indication for immediate delivery to prevent hypoxic-ischemic encephalopathy or fetal demise. **2. Analysis of Incorrect Options:** * **B (> 7.4):** This represents an alkalotic state, which is not typical of fetal distress. A normal fetal pH is slightly more acidic than adult pH (7.4) due to the CO2 gradient. * **C (> 7.1):** While a pH of 7.15 is indeed distress, the threshold for intervention begins at < 7.2. Using > 7.1 as a cutoff would delay necessary intervention for babies already in the "danger zone" (7.11–7.19). **High-Yield Clinical Pearls for NEET-PG:** * **Contraindications for FBS:** Maternal infections (HIV, Hepatitis, Herpes), fetal bleeding disorders (Hemophilia), and prematurity (< 34 weeks). * **Lactate vs. pH:** Modern practice often uses **Scalp Lactate**; a level **> 4.8 mmol/L** is considered abnormal and indicates the need for delivery. * **Positioning:** FBS is performed with the mother in the left lateral position to avoid aortocaval compression.

Question 97: An absolute indication of Cesarean Section is?

A. Malpresentation
B. Previous Cesarean section
C. Cephalopelvic disproportion (CPD) (Correct Answer)
D. Breech presentation

Explanation: **Explanation:** The correct answer is **Cephalopelvic Disproportion (CPD)**. In obstetrics, an **absolute indication** for a Cesarean Section (CS) refers to a clinical scenario where a vaginal delivery is physically impossible or poses an immediate, life-threatening risk to the mother or fetus. CPD occurs when there is a mismatch between the size of the fetal head and the maternal pelvic dimensions. Since the bony pelvis cannot expand and the fetal head cannot compress beyond a certain limit, vaginal delivery is mechanically impossible. **Analysis of Options:** * **A. Malpresentation:** This is a broad term. While some malpresentations (like transverse lie) require CS, others (like face presentation with mento-anterior position) can be delivered vaginally. Thus, it is a relative indication. * **B. Previous Cesarean Section:** This is a relative indication. Many women are candidates for **VBAC** (Vaginal Birth After Cesarean) provided the previous incision was a low-transverse segment and there are no recurring indications. * **D. Breech Presentation:** Most breech babies are delivered via CS for safety, but vaginal breech delivery is still an option in specific criteria (e.g., frank breech, adequate pelvis, multipara). **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Indications for CS:** Grade IV Placenta Previa (Central), Contracted Pelvis (CPD), Pelvic tumors obstructing the birth canal, and Advanced Carcinoma Cervix. * **CPD Diagnosis:** It is often a retrospective diagnosis made when labor fails to progress despite adequate uterine contractions. * **Trial of Labor (TOL):** Contraindicated in cases of absolute CPD or prior classical CS.

Question 98: Which of the following is used for controlling convulsions in an eclamptic patient?

A. Mannitol
B. Furosemide
C. Hydralazine
D. MgSO4 (Correct Answer)

Explanation: **Explanation:** **Magnesium Sulfate (MgSO4)** is the drug of choice for both the prevention and control of convulsions in eclampsia. It acts primarily by decreasing acetylcholine release at the neuromuscular junction and antagonizing NMDA receptors in the brain, which raises the seizure threshold. Unlike traditional anticonvulsants, it does not cause significant CNS depression in the mother or fetus. **Analysis of Options:** * **MgSO4 (Correct):** It is superior to Diazepam, Phenytoin, or Lytic cocktail in reducing the risk of recurrent seizures and maternal mortality (as proven by the Collaborative Eclampsia Trial). * **Mannitol (Incorrect):** This is an osmotic diuretic used to reduce intracranial pressure in cerebral edema; it is not an anticonvulsant. * **Furosemide (Incorrect):** A loop diuretic used for pulmonary edema or congestive heart failure. In eclampsia, it is only indicated if there is evidence of pulmonary edema. * **Hydralazine (Incorrect):** This is a vasodilator used to control severe hypertension (BP ≥160/110 mmHg) in preeclampsia/eclampsia. While it prevents strokes, it does not treat the seizures themselves. **High-Yield Clinical Pearls for NEET-PG:** * **Regimen:** The **Pritchard Regimen** (IM) and **Zuspan Regimen** (IV) are the standard protocols. * **Therapeutic Range:** 4–7 mEq/L. * **Monitoring:** Before every dose, check for: 1. Patellar reflex (present), 2. Respiratory rate (>12-14/min), and 3. Urine output (>30 ml/hr or 100 ml/4hr). * **Toxicity:** Loss of patellar reflex is the earliest sign of toxicity (>7 mEq/L). Respiratory depression occurs at >10 mEq/L. * **Antidote:** 10 ml of 10% **Calcium Gluconate** IV (administered slowly).

Question 99: What is the most common type of breech presentation at term?

A. Frank breech (Correct Answer)
B. Complete breech
C. Incomplete breech
D. Footling breech

Explanation: **Explanation:** Breech presentation occurs when the fetal buttocks or feet are the presenting part. At term (37 weeks or more), the **Frank breech** is the most common variety, accounting for approximately **60–70%** of all breech deliveries. **1. Why Frank Breech is Correct:** In a Frank breech, the fetal hips are flexed and the knees are extended (the feet are near the head). This position is particularly common in primigravidae because the tight abdominal and uterine walls favor the "pike" position. It is clinically significant because the firm buttocks create a good seal against the cervix, reducing the risk of umbilical cord prolapse compared to other breech types. **2. Analysis of Incorrect Options:** * **Complete Breech (B):** Both hips and knees are flexed (the fetus is "sitting cross-legged"). This accounts for about 5–10% of cases and is more common in multiparous women. * **Incomplete/Footling Breech (C & D):** In these types, one or both hips are extended, and one or both feet (or knees) are the presenting part. These are the least common at term and carry the highest risk of **cord prolapse** because the presenting part does not adequately fill the lower uterine segment. **NEET-PG High-Yield Pearls:** * **Incidence:** Breech presentation occurs in 3–4% of all term deliveries (but is much higher in preterm labor, ~25% at 28 weeks). * **Risk Factor:** The most common cause of breech is **prematurity**. * **Management:** External Cephalic Version (ECV) is typically offered at 36 weeks in primigravidae and 37 weeks in multigravidae. * **Safety:** Frank breech is the most "favorable" for a trial of vaginal breech delivery if criteria are met, due to the lower risk of cord accidents.

Question 100: A 26-year-old female at 39 weeks gestation presents with a gush of fluid and regular contractions. On examination, her membranes are ruptured, contractions occur every two minutes, and cervical dilatation is 4 cm. The fetal heart rate is 140/min and reactive. She was admitted for labor and delivery. Over the next four hours, cervical dilatation progressed to 9 cm. In the past hour, the fetal heart rate increased from a baseline of 140/min to 160/min, and moderate to severe variable decelerations are seen with each contraction. The fetal heart rate does not respond to scalp stimulation. A cesarean section was decided. What is the most important reason for this decision?

A. Fetal distress
B. Fetal acidemia
C. Fetal hypoxic encephalopathy
D. Non-reassuring fetal heart rate tracing (Correct Answer)

Explanation: ### Explanation **Correct Option: D. Non-reassuring fetal heart rate (FHR) tracing** The primary reason for the cesarean section in this scenario is a **non-reassuring fetal heart rate tracing**. The clinical picture shows a rising baseline (tachycardia), moderate to severe variable decelerations, and, most critically, a **lack of acceleration upon fetal scalp stimulation**. Scalp stimulation is a high-yield clinical tool: a positive response (acceleration) has a high predictive value (99%) for a normal fetal scalp pH (>7.25). The absence of acceleration in the presence of repetitive decelerations indicates that the fetus is no longer compensating well, necessitating immediate delivery to prevent further deterioration. **Why other options are incorrect:** * **A. Fetal distress:** This is an older, non-specific term that has been largely replaced in modern obstetrics by "non-reassuring fetal status" or specific FHR categories (e.g., Category III). It is a clinical "impression" rather than the specific diagnostic reason for the intervention. * **B. Fetal acidemia:** While the tracing suggests a high risk of acidemia, it can only be definitively diagnosed via fetal scalp blood pH sampling or umbilical cord blood gas analysis after birth. We *suspect* acidemia, but we *act* on the tracing. * **C. Fetal hypoxic encephalopathy:** This is a potential long-term neurological consequence (sequela) of prolonged intrapartum asphyxia, not the immediate indication for surgery. The goal of the cesarean section is to *prevent* this condition. **Clinical Pearls for NEET-PG:** * **Variable Decelerations:** Usually caused by umbilical cord compression. * **Scalp Stimulation:** If it elicits an acceleration, the fetal pH is almost certainly >7.20-7.25 (rules out significant acidemia). * **Management:** In the first stage of labor (as seen here at 9 cm), if the FHR is non-reassuring and does not improve with resuscitative measures (left lateral position, oxygen, hydration), **emergency cesarean section** is the treatment of choice.

Practice by Chapter

Physiology of Labor

Practice Questions

Stages of Labor and Normal Progression

Practice Questions

Fetal Monitoring Techniques

Practice Questions

Pain Management in Labor

Practice Questions

Induction and Augmentation of Labor

Practice Questions

Operative Delivery (Forceps and Vacuum)

Practice Questions

Cesarean Section: Indications and Techniques

Practice Questions

Dystocia and Abnormal Labor Patterns

Practice Questions

Obstetric Emergencies

Practice Questions

Postpartum Hemorrhage Management

Practice Questions

Want unlimited practice?

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

Start For Free