Labor and Delivery Practice Questions

Q: At what gestational age should an uncomplicated triplet pregnancy be delivered?

34 weeks. **Explanation:** The timing of delivery in multiple gestations is a balance between the risks of prematurity and the increasing risk of stillbirth and placental insufficiency as the pregnancy progresses. **1. Why 34 weeks is correct:** For an **uncomplicated triplet pregnancy**, the risk of fetal demise increases significantly after 34 weeks. According to standard guidelines (ACOG and RCOG), elective delivery is recommended at **34 weeks 0 days**. At this stage, the benefits of avoiding potential intrauterine complications outweigh the neonatal risks associated with late preterm birth. Corticosteroids are typically administered prior to delivery to enhance fetal lung maturity. **2. Why the other options are incorrect:** * **35 weeks (Option B):** While only one week later, data shows a sharp rise in the risk of stillbirth in triplet pregnancies beyond the 34-week mark. * **37 weeks (Option C):** This is the recommendation for **uncomplicated twin pregnancies** (specifically dichorionic diamniotic twins). For triplets, 37 weeks is considered "post-term" due to extreme uterine distention and placental exhaustion. * **38 weeks (Option D):** This is the timing for a standard **singleton pregnancy**. Carrying triplets to this age poses a severe risk of maternal complications (preeclampsia, abruption) and fetal death. **High-Yield Clinical Pearls for NEET-PG:** * **Singleton:** 39–40 weeks. * **Twins (DCDA):** 37–38 weeks. * **Twins (MCDA):** 36–37 weeks. * **Twins (MCMA):** 32–34 weeks (delivered via Cesarean). * **Triplets:** 34 weeks. * **Mode of delivery for triplets:** Almost always **Cesarean section** due to the high risk of malpresentation and cord prolapse.

Q: A 27-year-old G1P0 woman at 39 weeks' gestation presents to the labor and delivery suite and progresses through the stages of labor normally. During delivery of the infant, the head initially progresses beyond the perineum and then retracts. Gentle traction does not facilitate delivery of the infant. Which of these options is the first step in the management?

Flex mother's thigh against her abdomen.. ### Explanation The clinical scenario describes **Shoulder Dystocia**, characterized by the "Turtle Sign" (head retracting against the perineum) and failure of the shoulders to deliver with standard traction. This is an obstetric emergency where the anterior shoulder becomes impacted behind the maternal symphysis pubis. **Why Option C is Correct:** The first-line management for shoulder dystocia is the **McRoberts Maneuver**. This involves hyperflexing the mother's thighs against her abdomen. This action flattens the lumbosacral spine, rotates the symphysis pubis superiorly, and widens the pelvic outlet, which helps disimpact the anterior shoulder. It is the least invasive and most effective initial step, often resolving up to 40% of cases. **Analysis of Incorrect Options:** * **Option A:** While abduction and suprapubic pressure (Mazzanti maneuver) are used, they are typically performed *after* or *simultaneously* with McRoberts. Note: Suprapubic pressure is correct, but McRoberts (flexion) is the specific initial positional change taught as the first step. * **Option B:** **Fundal pressure is strictly contraindicated.** It further impacts the shoulder against the symphysis and increases the risk of uterine rupture and brachial plexus injury (Erb’s palsy). * **Option D:** This describes the **Zavanelli maneuver**, which is a last-resort measure used only after all other maneuvers (Woods' screw, Rubin, posterior arm delivery) have failed. **Clinical Pearls for NEET-PG:** * **Mnemonic (HELPERR):** **H**elp, **E**valuate for episiotomy, **L**egs (McRoberts), **P**ressure (Suprapubic), **E**nter (Internal rotation), **R**emove (Posterior arm), **R**oll (Gaskin maneuver). * **Risk Factors:** Maternal obesity, gestational diabetes, and fetal macrosomia. * **Complications:** Fetal brachial plexus injury (C5-C6), clavicular fracture, and maternal postpartum hemorrhage.

Q: Delayed cord clamping allows how much blood to enter fetal circulation?

50-100ml. **Explanation:** **Delayed Cord Clamping (DCC)** refers to the practice of waiting at least **60 seconds** (or until pulsations cease) after the birth of the infant before clamping the umbilical cord. **Why 50-100ml is correct:** During the first minute of life, a significant volume of blood is transferred from the placenta to the newborn via the umbilical vein. This "placental transfusion" provides approximately **80–100 ml** of additional blood (roughly 25-30 ml/kg of body weight). This volume contains about 40–50 mg/kg of extra iron, which significantly boosts the infant's iron stores and reduces the risk of iron-deficiency anemia in the first six months of life. **Analysis of Incorrect Options:** * **B, C, and D (100-200ml+):** These volumes are physiologically excessive. The total blood volume of a term neonate is approximately 80 ml/kg. A transfusion of 150-200ml would represent nearly doubling the infant's blood volume, which would lead to severe circulatory overload and symptomatic polycythemia. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** WHO and ACOG recommend waiting **at least 30–60 seconds** for both term and preterm infants. * **Positioning:** The infant should be held at or slightly below the level of the introitus (though recent evidence suggests skin-to-skin on the mother's abdomen does not significantly hinder transfusion). * **Benefits:** In **preterm** infants, DCC is crucial as it reduces the need for blood transfusions and decreases the incidence of Intraventricular Hemorrhage (IVH) and Necrotizing Enterocolitis (NEC). * **Risk:** The primary minor risk associated with DCC is a slight increase in **neonatal jaundice** requiring phototherapy; however, the benefits of improved iron stores outweigh this risk. * **Contraindication:** DCC should be avoided in cases of maternal hemorrhage, placental abruption, or if the infant requires immediate resuscitation.

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: Breech presentation is associated with increased incidence of perinatal morbidity. What is the percentage of breech presentation at term?

3%. **Explanation:** The correct answer is **C (3%)**. **1. Understanding the Concept:** Breech presentation occurs when the fetal buttocks or feet are the leading parts in the birth canal. The incidence of breech presentation is inversely proportional to the gestational age. In early pregnancy, the fetus is mobile and the volume of amniotic fluid is relatively high, leading to a higher incidence of malpresentation (approx. 25% at 28 weeks). As the fetus grows and the uterus becomes more cramped, the fetus typically rotates into the cephalic position to accommodate the larger head in the wider fundus. By **term (37+ weeks)**, the incidence stabilizes at approximately **3-4%**. **2. Analysis of Options:** * **A (1%) & B (2%):** These figures are too low for term pregnancies. While the incidence decreases as term approaches, it rarely drops below 3% in the general population. * **D (5%):** This is slightly higher than the standard statistical average for term breech. 5% is more representative of the incidence around 34-36 weeks of gestation. **3. NEET-PG High-Yield Pearls:** * **Most common cause:** Prematurity is the most common cause of breech presentation. * **Types:** Frank breech (most common at term), Complete breech, and Footling breech (highest risk of cord prolapse). * **Management:** External Cephalic Version (ECV) is typically offered at 36 weeks in primigravida and 37 weeks in multigravida to reduce the incidence of breech at delivery. * **Risk Factors:** Hydrocephalus, uterine anomalies (septate/bicornuate), placenta previa, and polyhydramnios. * **Delivery:** Planned Cesarean section is generally preferred (based on the Term Breech Trial), though vaginal delivery may be considered in specific criteria.

Q: What is the engaging diameter in a deflexed head?

Occipitofrontal diameter. In fetal skull mechanics, the **engaging diameter** is determined by the degree of flexion or extension of the fetal head as it enters the pelvic brim. ### **Explanation of the Correct Answer** In a **deflexed head** (also known as the military position), the head is neither flexed nor extended. The chin is not tucked against the chest, causing the **Occipitofrontal diameter** to present at the pelvic inlet. This diameter measures approximately **11.5 cm**, which is larger than the diameter of a well-flexed head, often leading to a more difficult or prolonged labor. ### **Analysis of Incorrect Options** * **A. Biparietal diameter (9.5 cm):** This is the widest transverse diameter of the fetal head. While it must pass through the pelvic inlet, it is not the longitudinal engaging diameter that changes with flexion/deflexion. * **C. Suboccipitobregmatic diameter (9.5 cm):** This is the engaging diameter of a **well-flexed head** (vertex presentation). It is the smallest and most favorable diameter for vaginal delivery. * **D. Bitemporal diameter (8.0 cm):** This is the shortest transverse diameter between the two temples and is not the primary engaging diameter in the context of head attitude. ### **High-Yield Clinical Pearls for NEET-PG** * **Well-flexed head:** Suboccipitobregmatic (9.5 cm) * **Deflexed head (Military):** Occipitofrontal (11.5 cm) * **Partial extension (Brow):** Mentovertical (13.5 cm) — *Largest diameter, usually requires C-section.* * **Complete extension (Face):** Submentobregmatic (9.5 cm) * **Rule of Thumb:** As the head deflexes, the engaging diameter increases until it reaches the Brow presentation, then decreases again as it moves toward a Face presentation.

Question 1

At what gestational age should an uncomplicated triplet pregnancy be delivered?

Accepted Answer

34 weeks

Answer

35 weeks

Answer

37 weeks

Answer

38 weeks

Question 2

A pregnant woman with a history of LSCS presents with hematuria. What is the most likely diagnosis?

Accepted Answer

Ureteral injury

Answer

Impending scar rupture of the uterus

Answer

Cystitis

Answer

Prolonged labor

Question 3

A 27-year-old G1P0 woman at 39 weeks' gestation presents to the labor and delivery suite and progresses through the stages of labor normally. During delivery of the infant, the head initially progresses beyond the perineum and then retracts. Gentle traction does not facilitate delivery of the infant. Which of these options is the first step in the management?

Accepted Answer

Flex mother's thigh against her abdomen.

Answer

Abduct mother's thigh and apply suprapubic pressure.

Answer

Apply fundal pressure.

Answer

Push infant's head back into the uterus and perform a cesarean section.

Question 4

Trial of labor is indicated in which of the following conditions of uterine contraction?

Accepted Answer

Minimal contraction of the pelvis

Answer

Uterine inertia

Answer

Hypotonic dysfunction

Answer

Moderate contracted pelvis

Question 5

Delayed cord clamping allows how much blood to enter fetal circulation?

Accepted Answer

50-100ml

Answer

100-200ml

Answer

120-150ml

Answer

150-180ml

Question 6

Which of the following is NOT a condition for trial of vaginal delivery in VBAC?

Accepted Answer

Previous Cesarean section of more than 1

Answer

Breech presentation

Answer

Presence of anesthesiologist

Answer

Informed consent

Question 7

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 8

Breech presentation is associated with increased incidence of perinatal morbidity. What is the percentage of breech presentation at term?

Accepted Answer

3%

Answer

1%

Answer

2%

Answer

5%

Question 9

What is the engaging diameter in a deflexed head?

Accepted Answer

Occipitofrontal diameter

Answer

Biparietal diameter

Answer

Suboccipitobregmatic diameter

Answer

Bitemporal diameter

Question 10

A primigravida presents with vaginal bleeding at term, but her vital signs are normal. What is the most appropriate management?

Accepted Answer

Examination under anesthesia with amniotomy

Answer

Immediate low-cesarean section

Answer

Conservative management

Answer

Classical cesarean section

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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