Labor and Delivery Practice Questions

Q: Which of the following is an absolute contraindication for vaginal delivery?

Central placenta previa. **Explanation:** **Central Placenta Previa (Type IV)** is an absolute contraindication for vaginal delivery because the placenta completely covers the internal os. As the cervix dilates during labor, the placental attachments are inevitably sheared off, leading to catastrophic, life-threatening maternal hemorrhage and fetal exsanguination. In such cases, elective cesarean section is mandatory. **Analysis of Incorrect Options:** * **Previous Cesarean Section:** This is a *relative* contraindication. Many women are candidates for **VBAC** (Vaginal Birth After Cesarean) or **TOLAC** (Trial of Labor After Cesarean), provided the previous incision was a low transverse uterine incision and there are no other complications. * **Breech Presentation:** While often delivered via cesarean to reduce neonatal morbidity, vaginal breech delivery is possible in specific circumstances (e.g., frank breech, adequate pelvis, multiparity) and is therefore a *relative* contraindication. * **Heart Disease in Pregnancy:** Most cardiac patients are actually encouraged to have a **planned vaginal delivery** (often with an assisted second stage using forceps/ventouse to limit maternal pushing) because it involves less blood loss and lower risk of postoperative thromboembolism compared to surgery. **NEET-PG High-Yield Pearls:** * **Absolute Contraindications to Vaginal Delivery:** Central placenta previa, vasa previa, pelvic inlet contraction (CPD), active genital herpes, and transverse lie. * **Management of Placenta Previa:** If the placental edge is **>2 cm** from the internal os, vaginal delivery can be attempted. If **<2 cm or covering the os**, cesarean is required. * **Stallworthy’s Sign:** A drop in fetal heart rate when the head is pressed into the pelvis, seen in posterior placenta previa.

Q: Blood in urine during labor is diagnostic of:

Obstructed labor. **Explanation:** **Obstructed labor** is the correct answer because hematuria is a classic clinical sign of prolonged pressure on the maternal soft tissues. In obstructed labor, the fetal presenting part is tightly wedged against the maternal symphysis pubis. This causes significant compression of the **bladder and urethra**, leading to pressure necrosis, capillary damage, and subsequent bleeding into the urinary tract. Hematuria in this context is often a precursor to the formation of a vesicovaginal fistula (VVF). **Analysis of Incorrect Options:** * **Impending scar rupture:** While hematuria can occasionally be seen in actual uterine rupture, the most characteristic signs of *impending* rupture are a pathological retraction ring (Bandl’s ring), intense abdominal pain, and fetal distress. Hematuria is more specific to the mechanical trauma of obstruction. * **Urethral injury:** While this causes blood in the urine, it is usually a result of direct trauma (e.g., forceps delivery or catheterization) rather than a diagnostic feature of the labor process itself. * **Cystitis:** This is a pre-existing or postpartum infection. While it causes microscopic or gross hematuria, it is accompanied by frequency, urgency, and dysuria, and is not a diagnostic hallmark of labor progression. **High-Yield Clinical Pearls for NEET-PG:** * **Bandl’s Ring:** A pathognomonic sign of obstructed labor, representing the visible junction between the thickened upper uterine segment and the thinned-out lower segment. * **Vesicovaginal Fistula (VVF):** The most common cause of VVF in developing countries is neglected obstructed labor due to ischemic necrosis. * **Triad of Obstructed Labor:** Maternal exhaustion/dehydration, Bandl’s ring, and features of fetal distress. * **Management:** Obstructed labor is a surgical emergency; the definitive management is almost always a **Cesarean Section**.

Q: What is the management for breech presentation with a footling?

Cesarean section. **Explanation:** The management of breech presentation depends significantly on the specific type of breech. In **Footling Breech**, one or both feet are the presenting part below the buttocks. **Why Cesarean Section is the Correct Choice:** Footling breech is a contraindication for vaginal delivery. The primary risk is **Umbilical Cord Prolapse**, as the feet do not provide a sufficient seal against the cervix (unlike the broad surface of the buttocks in frank breech or the head in vertex presentation). When the membranes rupture, the cord can easily slip past the feet. Additionally, the small diameter of the feet can lead to the delivery of the lower body through an incompletely dilated cervix, resulting in **entrapment of the after-coming head**, which is a life-threatening emergency. Therefore, a planned Cesarean section is the safest mode of delivery. **Analysis of Incorrect Options:** * **A. Vaginal Delivery:** Generally reserved for Frank or Complete breech under strict criteria (e.g., Term gestation, estimated weight 2.5–3.5kg, flexed head). It is avoided in footling breech due to the high risk of cord prolapse. * **C. Forceps Delivery:** Piper’s forceps are used specifically for the **after-coming head** in a vaginal breech delivery, not as a primary method to manage the presentation itself. * **D. Internal Podalic Version:** This is a procedure used almost exclusively for the delivery of the **second twin** (non-vertex) and is not indicated for a singleton footling breech. **NEET-PG High-Yield Pearls:** * **Most common breech:** Frank breech (thighs flexed, knees extended). * **Highest risk of cord prolapse:** Footling breech (up to 15-18%). * **Prerequisite for Vaginal Breech:** The head must be flexed (diagnosed via USG) to prevent hyperextension ("Star-gazing fetus"). * **Term Breech Trial (2000):** Established that planned CS is safer than vaginal birth for term breech fetuses.

Q: Which of the following is NOT an indication for oxytocin?

Spontaneous premature labor. Oxytocin is a potent uterotonic hormone synthesized in the hypothalamus and released by the posterior pituitary. Its primary physiological roles are stimulating uterine contractions and the milk-ejection reflex. **Explanation of the Correct Answer:** **Option A (Spontaneous premature labor)** is the correct answer because oxytocin is **contraindicated** in this scenario. In preterm labor, the clinical goal is to stop contractions (tocolysis) to prolong pregnancy, whereas oxytocin stimulates contractions. Administering oxytocin would accelerate the delivery of a premature infant, increasing the risk of neonatal morbidity. **Explanation of Incorrect Options:** * **Option B (Postpartum hemorrhage):** Oxytocin is the first-line drug for the prevention and management of PPH. It causes rhythmic contractions of the upper uterine segment, compressing blood vessels at the placental site (living ligatures). * **Option C (Uterine inertia):** This refers to weak or infrequent uterine contractions during labor. Oxytocin is the drug of choice for **augmentation of labor** to correct hypotonic uterine dysfunction. * **Option D (Breast engorgement):** While oxytocin doesn't increase milk production (prolactin's role), it causes contraction of **myoepithelial cells** in the mammary alveoli. Intranasal oxytocin can be used to facilitate the milk-ejection reflex, relieving engorgement caused by "let-down" failure. **High-Yield NEET-PG Pearls:** * **Half-life:** Very short (3–5 minutes), requiring continuous IV infusion for labor induction. * **Side Effects:** Water intoxication (due to its ADH-like antidiuretic effect) and uterine rupture if used inappropriately. * **Contraindications:** Cephalopelvic disproportion (CPD), fetal distress, and previous classical cesarean section.

Q: Which of the following is the engaging diameter in the fetus in a left occiput anterior (LOA) position?

Suboccipitobregmatic. ### Explanation In the **Left Occiput Anterior (LOA)** position, the fetal head is in a state of **complete flexion**. When the head is well-flexed, the smallest possible diameter of the fetal skull presents to the pelvic inlet. **1. Why Suboccipitobregmatic is Correct:** The **Suboccipitobregmatic (SOB)** diameter extends from the undersurface of the occiput (at the junction with the neck) to the center of the bregma (anterior fontanelle). It measures approximately **9.5 cm**. This is the engaging diameter in all vertex presentations where the head is fully flexed (OA, LOA, ROA). **2. Analysis of Incorrect Options:** * **Mentovertical (13.5 cm):** This is the engaging diameter in **Brow presentation**, where the head is midway between flexion and extension. It is the largest diameter of the fetal head and usually results in obstructed labor. * **Submentobregmatic (9.5 cm):** This is the engaging diameter in **Face presentation** when the head is completely extended. While the measurement is the same as SOB, the landmark (mentum/chin) is different. * **Sternobregmatic:** This is not a standard obstetric diameter used to describe fetal head engagement. **3. Clinical Pearls for NEET-PG:** * **Vertex Presentation (Well-flexed):** Engaging diameter is **Suboccipitobregmatic (9.5 cm)**. * **Vertex Presentation (Deflexed/Military):** Engaging diameter is **Occipitofrontal (11.5 cm)**. * **Brow Presentation:** Engaging diameter is **Mentovertical (13.5 cm)**. * **Face Presentation:** Engaging diameter is **Submentobregmatic (9.5 cm)**. * **LOA** is considered the most common "ideal" position for delivery as it facilitates the normal mechanism of labor.

Q: What is the management for a breech presentation with an extended arm?

Lovset's maneuver. **Explanation:** In a breech delivery, the **Lovset’s maneuver** is the specific technique used to deliver the arms when they are extended or impacted above the pelvic brim. The maneuver involves grasping the fetus by the pelvic girdle and rotating the body 180 degrees while maintaining downward traction. This rotation brings the posterior arm under the symphysis pubis, allowing it to be delivered. The body is then rotated 180 degrees in the opposite direction to deliver the other arm. **Analysis of Options:** * **Pinard’s Maneuver (B):** This is used to bring down the legs in a **frank breech** presentation by applying pressure to the popliteal fossa to flex the knee. * **Cesarean Section (A):** While many breech presentations are delivered via C-section today, the question asks for the specific management of a procedural complication (extended arms) during a vaginal breech delivery. * **Dührssen’s Incision (D):** These are incisions made in the cervix at the 2, 6, and 10 o'clock positions to facilitate the delivery of an **entrapped after-coming head** when the cervix is not fully dilated. **Clinical Pearls for NEET-PG:** * **Mauriceau-Smellie-Veit Maneuver:** The gold standard for delivering the **after-coming head** (promotes flexion). * **Burns-Marshall Method:** Another technique for the after-coming head where the baby is allowed to hang to encourage flexion by gravity. * **Prerequisites for Vaginal Breech:** Estimated fetal weight 2.5–3.5 kg, flexed head, and a frank or complete breech presentation. * **Nuchal Arm:** A more severe complication than an extended arm, where the arm is wrapped behind the fetal neck; it also requires Lovset’s maneuver for resolution.

Question 1

Which of the following is an absolute contraindication for vaginal delivery?

Accepted Answer

Central placenta previa

Answer

Previous cesarean section

Answer

Breech presentation

Answer

Heart disease in pregnancy

Question 2

Which of the following is true about significant variable decelerations?

Accepted Answer

A drop in fetal heart rate to less than 70 bpm for 60 seconds

Answer

A drop in fetal heart rate to less than 90 bpm for 60 seconds

Answer

A drop in fetal heart rate to less than 100 bpm for 60 seconds

Answer

A drop in fetal heart rate to less than 80 bpm for 60 seconds

Question 3

A 25-year-old G1P0 delivers a 33-week infant vaginally. The delivery is uncomplicated. If the obstetrician wishes to optimize the outcome for the infant, when should the umbilical cord be clamped?

Accepted Answer

Between 30 and 60 seconds

Answer

Immediately

Answer

After 60 seconds

Answer

Leave the cord unclamped until delivery of the placenta

Question 4

Blood in urine during labor is diagnostic of:

Accepted Answer

Obstructed labor

Answer

Impending scar rupture

Answer

Urethral injury

Answer

Cystitis

Question 5

A 37-week primigravida presents with irregular uterine contractions. On examination, the cervix is 1 cm dilated and poorly effaced. What is the most appropriate management?

Accepted Answer

Sedation and wait

Answer

Cesarean section

Answer

Amniotomy

Answer

Oxytocin drip

Question 6

What is the management for breech presentation with a footling?

Accepted Answer

Cesarean section

Answer

Vaginal delivery

Answer

Forceps delivery

Answer

Internal podalic version

Question 7

Which of the following is NOT an indication for oxytocin?

Accepted Answer

Spontaneous premature labor

Answer

Postpartum hemorrhage

Answer

Uterine inertia

Answer

Breast engorgement due to inefficient milk ejection reflex

Question 8

Which of the following is the engaging diameter in the fetus in a left occiput anterior (LOA) position?

Accepted Answer

Suboccipitobregmatic

Answer

Mentovertical

Answer

Submentobregmatic

Answer

Sternobregmatic

Question 9

What is the management for a breech presentation with an extended arm?

Accepted Answer

Lovset's maneuver

Answer

Cesarean section

Answer

Pinard's maneuver

Answer

Dührssen's incision

Question 10

A 25-year-old woman, G2P1L1, presents at 37 weeks gestation with mild labor pains. On examination, she has a breech presentation with a closed os and a partially effaced cervix. What is the next management step?

Accepted Answer

Schedule an urgent ultrasound

Answer

Check operating theatre and prepare for external cephalic version

Answer

Wait and observe for spontaneous breech vaginal delivery

Answer

Schedule an emergency caesarean section

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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