Labor and Delivery — MCQs
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What is the earliest indication of concealed acute bleeding in pregnancy?
A 22-year-old primigravid woman at term presents to the labor room with contractions every 2 minutes. Her prenatal course was unremarkable, and she takes no medications and has no known drug allergies. Examination reveals her cervix to be 6 cm dilated and 100% effaced, with the fetus at 0 station. The fetal heart rate has a baseline in the 150s and is reactive. The patient desires an epidural for pain relief. Which of the following should be given orally shortly before the epidural is placed?
Presentation, when the engaging diameter is mentovertical, is?
Which of the following is an indication for Cesarean section after a previous Cesarean section?
During application of the cup in Ventouse, the 'knob' of the cup points towards which anatomical landmark?
Which of the following are causes of breech presentation?
A 37-week pregnant woman presents with bleeding per vaginam. Investigations reveal a severe degree of placenta previa. What is the appropriate management?
A 35-year-old G2P1L1 presents at 35 weeks of gestation with leakage per vagina. Examination of the pooled fluid shows it turns red litmus paper blue and exhibits ferning. The patient's temperature is 102 G2P1L1
All of the following is true about abruptio placentae except?
A hypertensive primigravida with completely subsided pre-eclamptic features, up to what gestational age should the pregnancy be continued?
Labor and Delivery Indian Medical PG Practice Questions and MCQs
Question 61: What is the earliest indication of concealed acute bleeding in pregnancy?
- A. Tachycardia (Correct Answer)
- B. Oliguria
- C. Postural hypotension
- D. Low body temperature
Explanation: **Explanation:** In the setting of acute concealed bleeding (such as abruptio placentae or ruptured ectopic pregnancy), the body initiates compensatory mechanisms to maintain perfusion to vital organs. **1. Why Tachycardia is correct:** Tachycardia is the **earliest clinical sign** of hypovolemia. When blood volume decreases, venous return to the heart drops, leading to a decrease in stroke volume. To maintain cardiac output ($CO = HR \times SV$), the sympathetic nervous system is activated, increasing the heart rate. In pregnant women, this sign is critical because they can lose up to 30-35% of their blood volume before a significant drop in blood pressure occurs, making tachycardia a more sensitive early indicator than hypotension. **2. Why other options are incorrect:** * **Postural Hypotension:** While an early sign of volume depletion, it requires changing the patient's position to elicit. In acute obstetric emergencies, tachycardia is often observed first during primary assessment. * **Oliguria:** This is a later sign indicating significant renal hypoperfusion and established shock (usually Stage III hemorrhage). * **Low body temperature:** Hypothermia is a late finding associated with the "lethal triad" of trauma/hemorrhage (acidosis, coagulopathy, and hypothermia) and indicates severe, decompensated shock. **Clinical Pearls for NEET-PG:** * **The "Rule of 30":** In obstetric hemorrhage, a systolic BP drop of 30 mmHg, a heart rate increase of 30 bpm, or a 30% loss of blood volume indicates significant distress. * **Shock Index (SI):** Defined as $HR / SBP$. A value $> 0.9$ in pregnancy is a highly sensitive marker for significant concealed hemorrhage and the need for transfusion. * **Note:** Always remember that due to the physiological hypervolemia of pregnancy, "normal" vital signs can be deceptive. Tachycardia should always be investigated.
Question 62: A 22-year-old primigravid woman at term presents to the labor room with contractions every 2 minutes. Her prenatal course was unremarkable, and she takes no medications and has no known drug allergies. Examination reveals her cervix to be 6 cm dilated and 100% effaced, with the fetus at 0 station. The fetal heart rate has a baseline in the 150s and is reactive. The patient desires an epidural for pain relief. Which of the following should be given orally shortly before the epidural is placed?
- A. Antacid (Correct Answer)
- B. Antibiotic
- C. Aspirin
- D. Clear liquid meal
Explanation: **Explanation:** The correct answer is **A. Antacid**. **Why Antacids are given:** Pregnant women are at a significantly increased risk of **aspiration pneumonitis (Mendelson Syndrome)** during labor. This is due to several physiological changes: increased intra-abdominal pressure from the gravid uterus, progesterone-mediated relaxation of the lower esophageal sphincter, and delayed gastric emptying. Before administering neuraxial anesthesia (like an epidural), it is standard practice to administer a non-particulate antacid (e.g., **Sodium Citrate**). The goal is to increase the pH of the gastric contents. If an emergency arises requiring general anesthesia or if the patient vomits and aspirates, a higher gastric pH ( >2.5) significantly reduces the risk of severe chemical pneumonitis. **Why other options are incorrect:** * **B. Antibiotic:** Routine prophylactic antibiotics are not indicated for the placement of an epidural. They are reserved for specific indications like Group B Strep (GBS) prophylaxis or prior to a Cesarean section. * **C. Aspirin:** Aspirin is an antiplatelet agent and is contraindicated immediately before neuraxial anesthesia due to the risk of an epidural hematoma. * **D. Clear liquid meal:** While clear liquids are often allowed in early labor, they do not provide the protective pH-neutralizing effect required before an anesthetic procedure. **NEET-PG High-Yield Pearls:** * **Mendelson Syndrome:** Defined as aspiration of gastric contents with a pH <2.5 and volume >25 ml (0.4 ml/kg). * **Non-particulate antacids** (Sodium Citrate) are preferred over particulate ones (Magnesium hydroxide) because they are less harmful if aspirated. * **Prokinetic agents** (Metoclopramide) may also be used to facilitate gastric emptying in laboring patients.
Question 63: Presentation, when the engaging diameter is mentovertical, is?
- A. Brow (Correct Answer)
- B. Face
- C. Vertex
- D. Breech
Explanation: In fetal malpresentations, the presenting part is determined by the degree of flexion or extension of the fetal head. **Explanation of the Correct Answer:** * **Brow Presentation (Option A):** This occurs when the fetal head is **partially extended**. The engaging diameter is the **mentovertical (MV)** diameter, which measures approximately **13.5 cm**. This is the largest diameter of the fetal skull, making vaginal delivery impossible if the presentation persists, as it exceeds the average dimensions of the maternal pelvic inlet. **Analysis of Incorrect Options:** * **Vertex Presentation (Option C):** The head is **completely flexed**. The engaging diameter is the **suboccipitobregmatic (SOB)**, measuring **9.5 cm**. This is the ideal diameter for a normal vaginal delivery. * **Face Presentation (Option B):** The head is **completely extended**. The engaging diameter is the **submentobregmatic (SMB)**, measuring **9.5 cm**. While the diameter is small, delivery depends on the position (mentum anterior is deliverable, mentum posterior is not). * **Breech Presentation (Option D):** This is a longitudinal lie where the buttocks or lower extremities are the presenting parts, not the fetal head. The engaging diameter is the **bitrochanteric (10 cm)**. **High-Yield Clinical Pearls for NEET-PG:** 1. **Deflexed Vertex:** Engaging diameter is **suboccipitofrontal (10 cm)**. 2. **Mnemonic for Diameters:** * Complete Flexion → Vertex → SOB (9.5 cm) * Incomplete Extension → Brow → MV (13.5 cm) - *Largest* * Complete Extension → Face → SMB (9.5 cm) 3. **Clinical Sign:** On vaginal examination in brow presentation, the **anterior fontanelle and supraorbital ridges** are palpable, but the chin (mentum) is not.
Question 64: Which of the following is an indication for Cesarean section after a previous Cesarean section?
- A. Hypertension
- B. Type 1 placenta previa
- C. Cephalopelvic disproportion (CPD) (Correct Answer)
- D. Multigravida
Explanation: **Explanation:** The decision for a repeat Cesarean section (CS) versus a Vaginal Birth After Cesarean (VBAC) depends on whether the original indication for the first surgery is **recurrent** or **non-recurrent**. **Why C is correct:** **Cephalopelvic Disproportion (CPD)** is considered a **recurrent indication**. It implies a structural mismatch between the fetal head and the maternal pelvis. If a woman had a previous CS for CPD, the pelvic dimensions remain unchanged; therefore, the risk of labor dystocia and uterine rupture during a Trial of Labor After Cesarean (TOLAC) is significantly high. According to standard guidelines, documented CPD is a strong indication for an elective repeat Cesarean section (ERCS). **Why the other options are incorrect:** * **A. Hypertension:** Pregnancy-induced hypertension or pre-eclampsia is a **non-recurrent** or transient indication. If the current pregnancy is stable and the cervix is favorable, induction of labor for a vaginal birth is often preferred over surgery. * **B. Type 1 Placenta Previa:** This is a "low-lying" placenta. In Type 1 (and often Type 2 anterior), the placental edge is far enough from the internal os to allow for a safe vaginal delivery. Only major degrees (Type 3 and 4) are absolute indications for CS. * **D. Multigravida:** Being a multigravida is actually a favorable factor for a successful VBAC, provided there are no other contraindications. It is not an indication for surgery. **NEET-PG High-Yield Pearls:** * **Most common indication for CS worldwide:** Previous Cesarean section. * **Success rate of VBAC:** Approximately 60–80% in carefully selected cases. * **Absolute Contraindications to VBAC:** Previous classical (vertical) or T-shaped uterine incision, previous uterine rupture, and any contraindication to vaginal birth (e.g., Placenta Previa). * **Risk of Rupture:** The risk of uterine rupture in a low transverse scar is ~0.5–1%, whereas in a classical scar, it is ~4–9%.
Question 65: During application of the cup in Ventouse, the 'knob' of the cup points towards which anatomical landmark?
- A. Brow
- B. Chin
- C. Neck
- D. Occiput (Correct Answer)
Explanation: **Explanation:** The **Ventouse (Vacuum Extractor)** is an instrument used for assisted vaginal delivery. The "knob" or "pointer" on the vacuum cup is a critical safety feature designed to assist the clinician in orientation and correct placement. **Why Occiput is correct:** The goal of vacuum application is to place the center of the cup over the **flexion point**. This point is located on the sagittal suture, approximately **3 cm anterior to the posterior fontanelle** and 6 cm posterior to the anterior fontanelle. When the cup is correctly positioned, the **knob points toward the leading point of the fetal head, which is the Occiput**. This ensures that traction promotes flexion of the head, minimizing the presenting diameter (suboccipitobregmatic) and facilitating easier passage through the birth canal. **Why other options are incorrect:** * **Brow and Chin:** If the knob points toward the brow or chin, the cup is likely placed too far anteriorly. This causes **deflexion** of the fetal head, increasing the presenting diameter and the risk of failure or trauma. * **Neck:** The neck is not a landmark for cup orientation; the cup must remain on the bony cranium to be effective and safe. **High-Yield Clinical Pearls for NEET-PG:** * **Flexion Point:** 3 cm anterior to the posterior fontanelle. * **Pressure:** Should not exceed **0.8 kg/cm²** (600 mmHg). * **Rule of 3s:** Abandon the procedure if there are 3 "pop-offs," 3 pulls with no progress, or if the procedure exceeds 30 minutes. * **Contraindication:** Vacuum is contraindicated in **preterm births (<34 weeks)** due to the risk of intraventricular hemorrhage.
Question 66: Which of the following are causes of breech presentation?
- A. Hydrocephalus
- B. Placenta previa
- C. Pelvic contracture
- D. All of the above (Correct Answer)
Explanation: **Explanation:** The correct answer is **D. All of the above**. The underlying medical concept for breech presentation is the **"Law of Accommodation."** In a normal pregnancy, the fetus maneuvers so that its smaller, more mobile pole (the head) occupies the narrower lower uterine segment, while the bulkier podalic pole (buttocks and flexed legs) occupies the roomier fundus. Any factor that interferes with this adaptation or prevents the head from engaging in the pelvis can result in a breech presentation. * **Hydrocephalus (Option A):** In this condition, the fetal head becomes larger than the breech. Following the Law of Accommodation, the larger head seeks the roomier fundus, while the smaller breech occupies the lower uterine segment. * **Placenta Previa (Option B):** The presence of the placenta in the lower uterine segment reduces the available space for the fetal head to engage, forcing the head into the fundus. * **Pelvic Contracture (Option C):** A narrow or deformed maternal pelvis prevents the fetal head from entering the pelvic brim (engagement), leading to malpresentation. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Cause:** Prematurity is the most common cause of breech presentation. * **Uterine Anomalies:** Septate or bicornuate uteri are significant maternal causes. * **Multiparity:** Due to laxity of the abdominal and uterine muscles, the fetus can easily change positions. * **Management:** External Cephalic Version (ECV) is typically offered at 36 weeks in primigravida and 37 weeks in multigravida to correct breech presentation.
Question 67: A 37-week pregnant woman presents with bleeding per vaginam. Investigations reveal a severe degree of placenta previa. What is the appropriate management?
- A. Immediate Cesarean section (Correct Answer)
- B. Blood transfusion
- C. Conservative management
- D. Medical induction of labor
Explanation: **Explanation:** The management of placenta previa is primarily determined by the **gestational age** and the **severity of bleeding**. 1. **Why Option A is correct:** In this case, the patient is at **37 weeks (term)** and has a **severe degree** of placenta previa (Type III or IV). At term, there is no benefit to delaying delivery. Furthermore, in major degrees of placenta previa, the placenta obstructs the internal os, making vaginal delivery impossible and life-threatening due to the risk of catastrophic hemorrhage. Therefore, an **immediate Cesarean section** is the definitive treatment of choice to ensure maternal and fetal safety. 2. **Why other options are incorrect:** * **Option B (Blood transfusion):** While resuscitation and blood transfusion are vital supportive measures in a bleeding patient, they do not address the underlying cause. Delivery is the definitive management. * **Option C (Conservative management):** Also known as **MacAfee’s regimen**, this is only indicated if the fetus is preterm (<37 weeks), the bleeding is not life-threatening, and the mother is hemodynamically stable. Since this patient is at 37 weeks, she has reached term. * **Option D (Medical induction):** Induction is contraindicated in major degrees of placenta previa because the placenta blocks the birth canal. Attempting vaginal delivery can lead to massive maternal hemorrhage. **High-Yield Clinical Pearls for NEET-PG:** * **MacAfee’s Regimen Goal:** To carry the pregnancy to 37 weeks to achieve fetal lung maturity. * **Vaginal Examination:** Never perform a digital per-vaginal (PV) examination in a suspected case of placenta previa in the ER, as it can provoke "torrential hemorrhage." * **Double Setup Examination:** If the diagnosis is uncertain (minor degrees), a vaginal examination is performed only in the operating theater with preparations ready for an immediate CS. * **Gold Standard Diagnosis:** Transvaginal Ultrasound (TVS) is safer and more accurate than transabdominal ultrasound for locating the placenta.
Question 68: A 35-year-old G2P1L1 presents at 35 weeks of gestation with leakage per vagina. Examination of the pooled fluid shows it turns red litmus paper blue and exhibits ferning. The patient's temperature is 102 G2P1L1
- A. Administer betamethasone
- B. Administer tocolytics
- C. Administer antibiotics (Correct Answer)
- D. Place a cervical cerclage
Explanation: **Explanation:** The clinical presentation describes a case of **Preterm Premature Rupture of Membranes (PPROM)** at 35 weeks, complicated by **Chorioamnionitis**. The diagnosis of ROM is confirmed by the alkaline pH of the fluid (turning red litmus blue) and the characteristic "ferning" pattern on microscopy. The presence of a high-grade fever (102°F) in this context is a hallmark sign of intra-amniotic infection (chorioamnionitis). **1. Why Antibiotics is the correct answer:** In any case of PPROM with evidence of infection (chorioamnionitis), the immediate management priority is the administration of broad-spectrum intravenous antibiotics (e.g., Ampicillin and Gentamicin) followed by **expeditious delivery**, regardless of the gestational age. Antibiotics reduce maternal and neonatal morbidity associated with sepsis. **2. Why other options are incorrect:** * **A. Betamethasone:** While steroids are used in PPROM for fetal lung maturity between 24–34 weeks, they are generally contraindicated or deferred in the presence of overt clinical infection, as delivery must not be delayed. * **B. Tocolytics:** Tocolysis is strictly contraindicated in the presence of chorioamnionitis. Prolonging the pregnancy in an infected environment increases the risk of maternal sepsis and neonatal neurological injury. * **D. Cervical Cerclage:** This is a prophylactic or emergency procedure for cervical insufficiency, not a treatment for ROM or infection. **Clinical Pearls for NEET-PG:** * **Diagnosis of ROM:** Nitrazine test (pH >6.5) and Ferning (due to sodium chloride and proteins in amniotic fluid) are high-yield diagnostic markers. * **Chorioamnionitis Criteria:** Fever >38°C (100.4°F) plus at least two of: maternal tachycardia, fetal tachycardia, uterine tenderness, or foul-smelling liquor. * **Management Rule:** If PPROM occurs at >34 weeks, the standard of care is induction of labor. If infection is present at *any* age, deliver immediately.
Question 69: All of the following is true about abruptio placentae except?
- A. Premature separation of normally attached placenta
- B. Bright red blood (Correct Answer)
- C. Risk of recurrence is about 15% with previous abruption
- D. More common in multigravida
Explanation: **Explanation:** Abruptio placentae refers to the premature separation of a normally situated placenta from the uterine wall before the birth of the fetus. **Why Option B is the correct answer (False statement):** In abruptio placentae, the bleeding is typically **dark-colored (non-clotting)** because it is often retroplacental and undergoes changes before escaping through the cervix. In contrast, **bright red, painless bleeding** is the hallmark of **Placenta Previa**. Abruptio is usually associated with severe abdominal pain and uterine tenderness. **Analysis of other options:** * **Option A:** This is the standard definition of abruption. Unlike placenta previa (where the placenta is low-lying), abruption involves a placenta in the normal upper segment. * **Option C:** Recurrence is a significant risk factor. After one episode of abruption, the risk of recurrence in a subsequent pregnancy is approximately **5–15%**, and it rises to 25% after two episodes. * **Option D:** Abruption is statistically more common in **multigravida** women. Other major risk factors include pregnancy-induced hypertension (most common cause), trauma, smoking, and cocaine use. **NEET-PG High-Yield Pearls:** * **Couvelaire Uterus:** A complication of severe abruption where blood extravasates into the myometrium, giving it a port-wine/purplish appearance. * **Most common cause of DIC in pregnancy:** Abruptio placentae (due to release of thromboplastin). * **Clinical Triad:** Abdominal pain, vaginal bleeding (may be concealed), and uterine hypertonicity/tenderness. * **Management:** If the fetus is alive and at term, or if there is maternal instability, immediate delivery (usually via LSCS) is indicated.
Question 70: A hypertensive primigravida with completely subsided pre-eclamptic features, up to what gestational age should the pregnancy be continued?
- A. 35 weeks
- B. 37 weeks (Correct Answer)
- C. 39 weeks
- D. 40 weeks
Explanation: **Explanation:** The management of hypertensive disorders in pregnancy depends on the severity of the disease and the gestational age. In this scenario, the patient is a primigravida whose pre-eclamptic features have subsided (stable/controlled gestational hypertension or mild pre-eclampsia). **Why 37 weeks is correct:** According to ACOG and NHBPEP guidelines, for women with **gestational hypertension or pre-eclampsia without severe features**, delivery is recommended at **37 0/7 weeks** of gestation. Continuing the pregnancy beyond 37 weeks (term) does not improve neonatal outcomes but significantly increases the risk of maternal complications such as placental abruption, progression to eclampsia, and HELLP syndrome. Therefore, 37 weeks is the optimal balance between fetal maturity and maternal safety. **Analysis of Incorrect Options:** * **35 weeks:** Delivery at this stage is considered late preterm. It is only indicated if there are **severe features** (e.g., uncontrollable BP, renal failure, or fetal distress) that do not respond to conservative management. * **39 weeks:** This is the standard timing for elective deliveries in uncomplicated pregnancies. In hypertensive patients, waiting until 39 weeks carries an unjustifiable risk of stillbirth and maternal morbidity. * **40 weeks:** Pregnancy is never allowed to reach post-dates or even full term (40 weeks) in the presence of hypertension due to the high risk of placental insufficiency. **High-Yield Clinical Pearls for NEET-PG:** * **Severe Pre-eclampsia:** If diagnosed at $\geq$ 34 weeks, deliver immediately after stabilization. * **Antihypertensive of choice:** Labetalol is generally the first-line oral agent; Hydralazine or IV Labetalol is used for hypertensive emergencies. * **Magnesium Sulfate ($MgSO_4$):** The drug of choice for seizure prophylaxis in severe pre-eclampsia and for controlling seizures in eclampsia (Pritchard Regimen). * **Definitive Treatment:** Delivery of the fetus and placenta remains the only definitive cure for pre-eclampsia.
Practice by Chapter
Physiology of Labor
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Stages of Labor and Normal Progression
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Fetal Monitoring Techniques
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Pain Management in Labor
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Induction and Augmentation of Labor
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Operative Delivery (Forceps and Vacuum)
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Cesarean Section: Indications and Techniques
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Dystocia and Abnormal Labor Patterns
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Obstetric Emergencies
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Postpartum Hemorrhage Management
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