Labor and Delivery Practice Questions

Q: Which of the following is true regarding postpartum hemorrhage (PPH)?

Type B lynch suture is used.. **Explanation:** Postpartum Hemorrhage (PPH) remains a leading cause of maternal mortality. Understanding its management and risk factors is crucial for NEET-PG. **1. Why Option A is Correct:** The **B-Lynch suture** is a life-saving surgical compression technique used in the management of atonic PPH when medical management (oxytocics) fails. It acts like a "pair of suspenders," compressing the anterior and posterior walls of the uterus against each other to achieve hemostasis. It is the most common uterine compression suture used to avoid a hysterectomy. **2. Analysis of Incorrect Options:** * **Option B:** While advances in active management (AMTSL) and drugs like Carbetocin have significantly reduced the incidence of **atonic PPH**, they have little impact on **traumatic PPH**. Traumatic PPH (lacerations, ruptures) is primarily dependent on obstetric skill, instrumental delivery, and fetal size, rather than pharmacological advances. * **Option C:** PPH is actually more common in **grand multiparous women** (parity ≥5) due to poor uterine tone (atony). However, as a general rule for exams, "multiparity" alone is often a distractor; the risk is specifically associated with the exhaustion of the myometrium in high-parity cases. * **Option D:** Polyhydramnios is a known **risk factor** for atonic PPH because the overdistended uterus cannot contract effectively after delivery. However, in the context of this specific question, Option A is the definitive clinical "truth" regarding management. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Blood loss >500 ml (Vaginal) or >1000 ml (LSCS). * **Most Common Cause:** Uterine Atony (70-80%). * **First-line Drug:** Oxytocin (10 IU IM or 20 IU IV infusion). * **Drug of Choice for Prophylaxis:** Oxytocin. * **Surgical Step-ladder:** Uterine massage → Oxytocics → Tamponade → B-Lynch → Uterine/Internal Iliac Artery Ligation → Hysterectomy.

Q: What is the name of the following manoeuvre?

Mauriceau-Smellie-Veit. ***Mauriceau-Smellie-Veit*** - This maneuver is specifically used for delivering the **aftercoming head** in breech presentations, involving **suprapubic pressure** and **jaw flexion**. - The technique involves placing fingers on the **maxilla** to flex the fetal head while applying **suprapubic pressure** from above. *Pinard* - This maneuver is used to **flex the knee** in **incomplete (footling) breech** presentations to bring down the foot. - It involves **hooking the popliteal fossa** with a finger to flex the knee and deliver the leg, not related to head delivery. *Ritzen* - This maneuver is used in **vertex presentations** to control the **fetal head** at the **perineum** during crowning. - It involves **controlled delivery** of the head to prevent **perineal tears**, not applicable to breech deliveries. *Loveset* - This maneuver is used for delivering **extended arms** in breech presentations by **rotating the fetus**. - It involves **180-degree rotation** to bring the posterior arm anterior for delivery, not for head delivery.

Q: What is the shortest diameter of the pelvic outlet?

Posterior sagittal diameter. The **pelvic outlet** is a diamond-shaped space bounded by the pubic symphysis anteriorly, the coccyx posteriorly, and the ischial tuberosities laterally [2]. Understanding its dimensions is crucial for predicting the progress of labor. **1. Why "Posterior Sagittal Diameter" is correct:** The **posterior sagittal diameter** is the distance from the midpoint of the intertuberosous line to the tip of the sacrum (or coccyx). It typically measures approximately **7.5 cm to 8 cm** [2]. In the context of the pelvic outlet, this is numerically the shortest anatomical measurement compared to the anteroposterior and transverse diameters. It is a critical dimension because if the transverse diameter is narrow, a compensatory long posterior sagittal diameter is required to allow the fetal head to pass. **2. Analysis of Incorrect Options:** * **Interspinous Diameter (A):** This measures approximately **10 cm** [1]. Importantly, this is the shortest diameter of the **pelvic cavity (mid-pelvis)**, not the outlet. It is a common "trap" in NEET-PG questions. * **Anteroposterior Diameter (B):** At the outlet, this measures from the lower border of the pubic symphysis to the tip of the coccyx, measuring about **9.5 cm to 11.5 cm** (increasing during labor as the coccyx deflects posteriorly) [2]. **3. Clinical Pearls for NEET-PG:** * **Narrowest part of the entire pelvis:** The **Interspinous diameter** (mid-pelvis) is the narrowest plane through which the fetal head must pass [1]. * **Obstetric Conjugate:** The shortest diameter of the **pelvic inlet** (approx. 10.5 cm) [1]. * **Bituberous (Transverse) Diameter of Outlet:** Measures ~11 cm; it is the distance between the inner borders of the ischial tuberosities [2]. * **Rule of Thumb:** If the sum of the Bituberous and Posterior Sagittal diameters is **less than 15 cm**, the outlet may be contracted, leading to dystocia.

Q: A labor curve for a woman, gravida 3, para 2, at 39 weeks' gestation is shown below. Membranes were ruptured at 4 cm. The amniotic fluid was clear, and there has been no indication of fetal distress. Previous infants weighed 3500 g and 3750 g. The estimated weight of this infant, which appears normal on ultrasound, is 3200 g. This labor curve is compatible with which of the following conditions?

Secondary arrest of dilation. ***Secondary arrest of dilation*** - The labor curve shows **initial progression** of cervical dilation followed by a **cessation of dilation** for ≥2 hours in the active phase, which defines secondary arrest. - This multiparous patient (G3P2) with a **smaller fetus** (3200g vs previous 3500-3750g) and **clear amniotic fluid** suggests uterine dysfunction rather than mechanical obstruction. *Prolonged latent phase* - Defined as latent phase lasting >**20 hours in nulliparous** or >**14 hours in multiparous** women before reaching 4 cm dilation. - The curve shows progression beyond the latent phase with active dilation occurring, ruling out this diagnosis. *Protracted active phase dilation* - Characterized by **slow but continuous** cervical dilation at <**1.2 cm/hour in nulliparous** or <**1.5 cm/hour in multiparous** women. - The curve shows **complete cessation** of dilation rather than slow continuous progress, making this incorrect. *Hypertonic uterine dysfunction* - Involves **frequent, painful contractions** with **poor coordination** and typically occurs in the **latent phase**. - This pattern shows normal initial active phase progression followed by arrest, not the characteristic uncoordinated contractions of hypertonic dysfunction.

Q: All of the following can be administered in acute hypertension during labor except?

IV diazoxide. **Explanation:** The management of acute severe hypertension in labor (Blood Pressure ≥160/110 mmHg) focuses on preventing maternal cerebrovascular accidents while maintaining placental perfusion. **Why IV Diazoxide is the Correct Answer:** IV Diazoxide is a potent vasodilator formerly used for hypertensive emergencies. However, it is **contraindicated** in labor because it causes profound maternal hypotension, which can lead to placental hypoperfusion and fetal distress. Furthermore, it acts as a powerful **tocolytic** (relaxes the uterus), which can arrest the progress of labor and increase the risk of postpartum hemorrhage (PPH). **Analysis of Other Options:** * **IV Labetalol (Option A):** A combined alpha and beta-blocker. It is considered a **first-line agent** due to its rapid onset and excellent safety profile. It avoids reflex tachycardia. * **Oral Nifedipine (Option B):** A calcium channel blocker (immediate-release formulation). It is a **first-line oral agent** used when IV access is difficult. It is effective and easy to administer. * **IV Dihydralazine/Hydralazine (Option C):** A direct vasodilator. It has been a traditional mainstay for acute hypertension in pregnancy. While it may cause reflex tachycardia, it remains a recommended option in many clinical guidelines. **Clinical Pearls for NEET-PG:** * **Target BP:** The goal is not to normalize BP but to bring it down to **140–150/90–100 mmHg** to prevent cerebral hemorrhage. * **Drug of Choice:** Most international guidelines (ACOG/RCOG) list **IV Labetalol** or **Hydralazine** and **Oral Nifedipine** as the three primary options. * **Avoid:** ACE inhibitors and ARBs are strictly contraindicated in pregnancy due to teratogenicity and fetal renal failure. * **Magnesium Sulfate:** Always remember that $MgSO_4$ is the drug of choice for seizure prophylaxis in eclampsia, but it is **not** an antihypertensive agent.

Q: Which of the following is NOT a maneuver used for the treatment of shoulder dystocia?

Lovset maneuver. **Explanation:** The correct answer is **D. Lovset maneuver**. The **Lovset maneuver** is used during a **breech delivery** to deliver the arms when they are extended or in a nuchal position. It involves rotating the fetal trunk 180 degrees while maintaining downward traction to bring the posterior arm under the symphysis pubis. It is not used for shoulder dystocia, which occurs during a cephalic (head-first) delivery. **Why the other options are incorrect (Maneuvers for Shoulder Dystocia):** * **McRoberts maneuver (Option C):** Usually the first-line intervention. It involves hyperflexing the mother's thighs against her abdomen, which flattens the sacral promontory and rotates the symphysis pubis cephalad, increasing the pelvic outlet. * **Wood’s maneuver (Option B):** Also known as the "Wood’s Screw maneuver." It involves rotating the posterior shoulder 180 degrees in a corkscrew fashion to dislodge the impacted anterior shoulder. * **Zavanelli maneuver (Option A):** A maneuver of last resort. It involves cephalic replacement (pushing the fetal head back into the vagina) followed by an emergency Cesarean section. **High-Yield Clinical Pearls for NEET-PG:** * **Shoulder Dystocia Mnemonic (HELPERR):** **H**elp, **E**pisiotomy, **L**egs (McRoberts), **P**ressure (Suprapubic), **E**nter (Internal rotation/Wood's), **R**emove posterior arm, **R**oll the patient (Gaskin maneuver). * **Suprapubic pressure (Mazzanti maneuver)** is used to dislodge the anterior shoulder; **Fundal pressure** is strictly contraindicated as it worsens impaction and increases the risk of uterine rupture. * The most common neonatal complication of shoulder dystocia is **Erb’s Palsy (C5-C6 injury)**.

Q: What is the first-line approach for shoulder dystocia?

McRoberts maneuver. **Explanation:** Shoulder dystocia is an obstetric emergency where the fetal head is delivered but the anterior shoulder becomes impacted behind the maternal symphysis pubis. The management follows a specific hierarchy of maneuvers, starting with the least invasive. **1. Why McRoberts Maneuver is Correct:** The **McRoberts maneuver** is the first-line intervention. It involves hyperflexion of the maternal hips against the abdomen. This action flattens the sacral promontory and rotates the symphysis pubis cephalad, increasing the pelvic outlet diameter and facilitating the release of the impacted shoulder. It is often combined with **suprapubic pressure** (Rubin I), which helps adduct the fetal shoulder. Together, these resolve up to 90% of cases. **2. Analysis of Incorrect Options:** * **Woods' corkscrew maneuver:** This is a secondary "internal" maneuver involving the rotation of the posterior shoulder. It is only performed if McRoberts and suprapubic pressure fail. * **Zavanelli maneuver:** This is a "last-resort" procedure involving cephalic replacement (pushing the head back into the uterus) followed by an emergency Cesarean section. It carries high maternal and fetal morbidity. * **Increased fundal pressure:** This is **strictly contraindicated**. Applying fundal pressure further impacts the shoulder against the symphysis and significantly increases the risk of uterine rupture and brachial plexus injury (Erb’s palsy). **NEET-PG High-Yield Pearls:** * **HELPERR Mnemonic:** Used for the sequence of management (H-Call for Help, E-Evaluate for Episiotomy, L-Legs/McRoberts, P-Suprapubic Pressure, E-Enter/Internal maneuvers, R-Remove posterior arm, R-Roll the patient). * **Turtle Sign:** The retraction of the fetal head against the perineum; the classic clinical sign of shoulder dystocia. * **Risk Factors:** Maternal diabetes (macrosomia) and instrumental delivery are the most significant predictors.

Q: A 24-year-old woman underwent a normal vaginal delivery of a term infant. After the delivery, the placenta does not deliver even after 30 minutes. What is the next recommended step for this patient?

Attempt a manual extraction of the placenta. **Explanation:** The clinical scenario describes a **Retained Placenta**, defined as the failure of the placenta to deliver within 30 minutes of the birth of the baby in the third stage of labor. **1. Why Option B is Correct:** Once the 30-minute threshold is crossed, the risk of postpartum hemorrhage (PPH) increases significantly. The standard management for a retained placenta is **Manual Removal of Placenta (MROP)**. This procedure is performed under effective anesthesia (usually regional or general) to manually shear the placenta from the uterine wall and extract it. **2. Why Other Options are Incorrect:** * **Option A:** Waiting further increases the risk of life-threatening hemorrhage and infection. 30 minutes is the globally accepted cutoff for intervention. * **Option C:** While oxytocin is used for the active management of the third stage (AMTSL) to prevent PPH, it is usually already administered at the delivery of the anterior shoulder. If the placenta is morbidly adherent (e.g., Placenta Accreta), oxytocin will not facilitate delivery. * **Option D:** Hysterectomy is a last resort, reserved for cases of **Placenta Accreta Spectrum** where manual removal fails or causes massive, uncontrollable bleeding. **3. High-Yield Clinical Pearls for NEET-PG:** * **Third Stage Duration:** 15 minutes with active management; 30 minutes with expectant management. * **Signs of Placental Separation:** Gush of blood, lengthening of the umbilical cord, and the uterus becoming firm, globular, and rising in the abdomen (Schultze or Duncan mechanisms). * **Risk Factors:** Previous C-section, curettage, or uterine surgery (increases risk of morbidly adherent placenta). * **Complication:** The most common complication of MROP is **hemorrhage and infection**; hence, prophylactic antibiotics are mandatory post-procedure.

Q: All of the following are included in the first stage of labor except?

Crowning of fetal head. **Explanation:** The first stage of labor (Cervical Stage) begins with the onset of true labor pains and ends with the **full dilatation of the cervix (10 cm)**. The primary physiological events during this stage are the preparation of the birth canal to allow the passage of the fetus. * **Why 'Crowning' is the correct answer:** Crowning occurs when the widest diameter of the fetal head (biparietal diameter) stretches the vulval outlet and no longer recedes between contractions. This is a hallmark event of the **second stage of labor** (Stage of Expulsion), which begins after full cervical dilatation and ends with the delivery of the fetus. * **Why other options are incorrect:** * **Effacement and Dilatation (A & B):** These are the cardinal features of the first stage. Effacement is the thinning and shortening of the cervix, while dilatation is the enlargement of the external os. * **Descent of head (D):** While descent is a continuous process throughout all stages of labor (one of the movements in the mechanism of labor), it begins during the first stage as the head engages and moves through the pelvic inlet. **High-Yield Clinical Pearls for NEET-PG:** * **Duration:** In primigravida, the first stage lasts ~12 hours; in multigravida, ~6 hours. * **Phases:** The first stage is divided into the **Latent phase** (slow dilatation up to 4 cm) and the **Active phase** (rapid dilatation from 4 cm to 10 cm). * **Friedman’s Curve:** Used to plot cervical dilatation against time to monitor labor progress. * **Active Management of Labor (AMTSL):** Primarily focuses on the third stage to prevent Postpartum Hemorrhage (PPH).

Q: In a primigravida patient experiencing preterm labor, which of the following agents cannot be used as a tocolytic except?

Ritodrine. **Explanation:** The question uses a double negative ("cannot be used... except"), which essentially asks: **"Which of the following is a tocolytic agent?"** **1. Why Ritodrine is correct:** Ritodrine is a **Beta-2 ($\beta_2$) adrenergic agonist**. It works by increasing intracellular cAMP, which leads to a decrease in intracellular calcium levels, thereby causing relaxation of the uterine smooth muscles (myometrium). While effective, its use has declined due to maternal side effects like tachycardia, pulmonary edema, and hyperglycemia. **2. Why the other options are incorrect:** * **Magnesium sulfate (MgSO4):** While historically used as a tocolytic, current ACOG and RCOG guidelines state that MgSO4 is **not** an effective tocolytic. In preterm labor, its primary role is **neuroprotection** of the fetus (reducing the risk of cerebral palsy) if delivery is imminent before 32 weeks. * **Dexamethasone:** This is a corticosteroid used for **fetal lung maturity** (to prevent RDS, IVH, and NEC). It has no effect on uterine contractions. * **Propranolol:** This is a non-selective **Beta-blocker**. Since $\beta_2$ stimulation causes uterine relaxation, a $\beta$-blocker would theoretically increase uterine tone or cause contractions, making it contraindicated in preterm labor. **High-Yield Clinical Pearls for NEET-PG:** * **First-line Tocolytic:** **Nifedipine** (Calcium Channel Blocker) is currently the drug of choice due to its oral administration and better safety profile. * **Atosiban:** A competitive Oxytocin receptor antagonist; highly specific with the fewest side effects but expensive. * **Indomethacin:** A COX inhibitor used as a tocolytic, especially in cases of polyhydramnios, but contraindicated after 32 weeks due to the risk of premature closure of the **Ductus Arteriosus**. * **Goal of Tocolysis:** To delay delivery for **48 hours** to allow for corticosteroid administration and maternal transport to a tertiary care center.

Question 1

Which of the following is true regarding postpartum hemorrhage (PPH)?

Accepted Answer

Type B lynch suture is used.

Answer

With new advances, both atonic and traumatic PPH can be reduced.

Answer

It is more common in multiparous women.

Answer

It is associated with polyhydramnios.

Question 2

What is the name of the following manoeuvre?

Accepted Answer

Mauriceau-Smellie-Veit

Answer

Pinard

Answer

Ritzen

Answer

Loveset

Question 3

What is the shortest diameter of the pelvic outlet?

Accepted Answer

Posterior sagittal diameter

Answer

Interspinous diameter

Answer

Anteroposterior diameter

Answer

None of the above

Question 4

A labor curve for a woman, gravida 3, para 2, at 39 weeks' gestation is shown below. Membranes were ruptured at 4 cm. The amniotic fluid was clear, and there has been no indication of fetal distress. Previous infants weighed 3500 g and 3750 g. The estimated weight of this infant, which appears normal on ultrasound, is 3200 g. This labor curve is compatible with which of the following conditions?

Accepted Answer

Secondary arrest of dilation

Answer

Prolonged latent phase

Answer

Protracted active phase dilation

Answer

Hypertonic uterine dysfunction

Question 5

All of the following can be administered in acute hypertension during labor except?

Accepted Answer

IV diazoxide

Answer

IV labetalol

Answer

Oral nifedipine

Answer

IV dihydralazine

Question 6

Which of the following is NOT a maneuver used for the treatment of shoulder dystocia?

Accepted Answer

Lovset maneuver

Answer

Zavenelli maneuver

Answer

Wood's maneuver

Answer

McRoberts maneuver

Question 7

What is the first-line approach for shoulder dystocia?

Accepted Answer

McRoberts maneuver

Answer

Woods' corkscrew maneuver

Answer

Zavanelli maneuver

Answer

Increased fundal pressure

Question 8

A 24-year-old woman underwent a normal vaginal delivery of a term infant. After the delivery, the placenta does not deliver even after 30 minutes. What is the next recommended step for this patient?

Accepted Answer

Attempt a manual extraction of the placenta

Answer

Wait for an additional 30 minutes

Answer

Initiate oxytocin

Answer

Hysterectomy

Question 9

All of the following are included in the first stage of labor except?

Accepted Answer

Crowning of fetal head

Answer

Effacement of cervix

Answer

Dilatation of cervix

Answer

Descent of head

Question 10

In a primigravida patient experiencing preterm labor, which of the following agents cannot be used as a tocolytic except?

Accepted Answer

Ritodrine

Answer

Magnesium sulfate (MgSO4)

Answer

Dexamethasone

Answer

Propranolol

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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