Labor and Delivery Practice Questions

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.

Q: A 25-year-old primigravida is diagnosed with preeclampsia at 38 weeks gestation. Magnesium sulfate infusion is started for seizure prophylaxis, and labor induction is planned. Her cervix is 3 cm dilated, slightly soft, and located anteriorly. The fetal head is at -1 station, and the cervical length is < 0.5 cm. What is her Bishop score?

8. The **Bishop Score** is a pre-labor scoring system used to predict the likelihood of a successful vaginal delivery following induction of labor. A score of $\geq 8$ suggests a high probability of successful induction, similar to spontaneous labor. ### **Calculation for this Patient:** The Bishop score evaluates five parameters: 1. **Dilation (3 cm):** 2 points (Range: 1–2 cm = 1 pt; 3–4 cm = 2 pts). 2. **Effacement (Cervical length 80\%$ or length $< 0.5$ cm = 3 pts). 3. **Station (-1):** 1 point (Station -3 = 0; -2 = 1; -1/0 = 2; +1/+2 = 3). *Note: In the modified Bishop score, -1 station is often assigned 1 point.* 4. **Consistency (Slightly soft/Medium):** 1 point (Firm = 0; Medium = 1; Soft = 2). 5. **Position (Anterior):** 2 points (Posterior = 0; Mid-position = 1; Anterior = 2). **Total Score: 2 + 3 + 1 + 1 + 1 = 8** ### **Why Other Options are Incorrect:** * **Option A (7):** This would be the score if the cervix were mid-positioned or firm. * **Option C & D (9 & 10):** These scores would require the cervix to be fully soft, more dilated (5+ cm), or the fetal head to be at a lower station (+1 or +2). ### **High-Yield Clinical Pearls for NEET-PG:** * **Interpretation:** A score of $\leq 6$ is considered an "unfavorable" cervix, indicating a need for cervical ripening agents (e.g., PGE2/Dinoprostone). * **Most Important Parameter:** Dilation is often considered the most critical individual component. * **Modified Bishop Score:** Some systems replace "Effacement %" with "Cervical Length (cm)." A length of $< 0.5$ cm is the maximum score (3 points). * **Indication:** In this patient (Preeclampsia at 38 weeks), delivery is indicated. Since her score is 8, she has a favorable cervix for direct induction with Oxytocin/ARM.

Q: Zavanelli's maneuver is performed in which of the following conditions?

Shoulder dystocia. **Explanation:** **Zavanelli’s maneuver** is a procedure of last resort used in the management of **Shoulder Dystocia**. It involves the cephalic replacement of the fetal head back into the birth canal, followed by an emergency Cesarean section. The maneuver is performed by manually flexing the fetal head and pushing it back into the vagina, reversing the movements of labor. It is only attempted when all other maneuvers (e.g., McRoberts, suprapubic pressure, internal rotation) have failed, as it carries a high risk of maternal and fetal morbidity. **Analysis of Incorrect Options:** * **B. Dystocia due to asynclitism:** Asynclitism refers to the tilting of the fetal head toward the maternal sacrum or symphysis. This is managed by monitoring labor progress or instrumental delivery; Zavanelli’s is never indicated here. * **C. Retained placenta:** This is a third-stage complication managed by controlled cord traction, manual removal of the placenta (MROP), or uterotonics. * **D. Face presentation:** Most face presentations (mentum anterior) deliver vaginally. Mentum posterior may require Cesarean section, but cephalic replacement is not a standard intervention. **High-Yield Clinical Pearls for NEET-PG:** * **HELPERR Mnemonic:** The standard sequence for shoulder dystocia: **H**elp, **E**pisiotomy, **L**egs (McRoberts), **P**ressure (Suprapubic), **E**nter (Internal rotation), **R**emove posterior arm, **R**oll the patient (Gaskin). * **McRoberts Maneuver:** The first-line management (hyperflexion of maternal thighs). * **Turtle Sign:** The clinical hallmark of shoulder dystocia where the fetal head retracts against the perineum. * **Complications:** Be alert for Erb’s palsy (C5-C6) and postpartum hemorrhage (PPH) in these cases.

Q: Which of the following is the shortest pelvic diameter?

Obstetric conjugate. The pelvic inlet (brim) has three anteroposterior diameters measured from the sacral promontory to different points on the symphysis pubis. Understanding these is crucial for assessing the adequacy of the birth canal. ### **Why Obstetric Conjugate is the Correct Answer** The **Obstetric Conjugate** is the shortest diameter of the pelvic inlet. It is measured from the sacral promontory to the **posterior surface of the symphysis pubis** (the bony prominence about 1 cm below the upper margin). It represents the actual space available for the fetal head to pass through. Its average length is **10 cm**. ### **Analysis of Incorrect Options** * **True Conjugate (Anatomical Conjugate):** Measured from the sacral promontory to the upper margin of the symphysis pubis. It is approximately **11 cm**. * **Diagonal Conjugate:** Measured from the sacral promontory to the lower margin of the symphysis pubis. It is the only diameter that can be measured clinically during a per-vaginal examination. It is the longest of the three, measuring approximately **12 cm**. * **All are equal:** This is incorrect as the points of measurement on the symphysis pubis vary, creating a difference of roughly 1–1.5 cm between each diameter. ### **High-Yield Clinical Pearls for NEET-PG** * **Calculation:** Obstetric Conjugate = Diagonal Conjugate minus 1.5 to 2 cm. * **Clinical Significance:** If the diagonal conjugate is >11.5 cm, the pelvis is likely adequate for a normal delivery. * **Transverse Diameter:** The widest diameter of the pelvic inlet is the Transverse Diameter (13 cm). * **Shortest Diameter of the Entire Pelvis:** The **Interspinous diameter** (at the level of the ischial spines in the mid-pelvis) is the narrowest part of the true pelvis, measuring **10 cm**.

Question 1

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 2

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 3

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 4

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 5

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 6

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

Question 7

What is the primary reason for shock in uterine inversion?

Accepted Answer

Neurogenic shock

Answer

Hypovolemic shock

Answer

Cardiogenic shock

Answer

Septic shock

Question 8

A 25-year-old primigravida is diagnosed with preeclampsia at 38 weeks gestation. Magnesium sulfate infusion is started for seizure prophylaxis, and labor induction is planned. Her cervix is 3 cm dilated, slightly soft, and located anteriorly. The fetal head is at -1 station, and the cervical length is < 0.5 cm. What is her Bishop score?

Accepted Answer

8

Answer

7

Answer

9

Answer

10

Question 9

Zavanelli's maneuver is performed in which of the following conditions?

Accepted Answer

Shoulder dystocia

Answer

Dystocia due to asynclitism

Answer

Retained placenta

Answer

Face presentation

Question 10

Which of the following is the shortest pelvic diameter?

Accepted Answer

Obstetric conjugate

Answer

Diagonal conjugate

Answer

True conjugate

Answer

All are equal

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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