Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 221: Recurrent breech presentation is due to:

A. Placenta previa
B. Hydrocephalus
C. Septate uterus (Correct Answer)
D. Short cord

Explanation: **Explanation:** The correct answer is **C. Septate uterus**. **Why Septate Uterus is Correct:** The primary factor determining fetal presentation is the **"Law of Accommodation,"** where the fetus maneuvers to fit its largest parts into the roomiest parts of the uterus. In a normal uterus, the fundus is wider, accommodating the bulky breech and limbs. However, in a **septate or bicornuate uterus**, the shape of the uterine cavity is permanently distorted. This structural anomaly restricts fetal rotation and often forces the head into the fundus, leading to **recurrent** (habitual) breech presentation in successive pregnancies. **Analysis of Incorrect Options:** * **A. Placenta Previa:** While this can cause a breech presentation by occupying the lower uterine segment, it is usually a sporadic occurrence and does not typically cause *recurrent* breech unless the placenta implants in the same location repeatedly (which is not the rule). * **B. Hydrocephalus:** This is a fetal anomaly where the enlarged head prefers the roomier fundus. While it causes breech presentation, it is generally an isolated event in a specific pregnancy rather than a cause of recurrence. * **D. Short Cord:** A short umbilical cord can restrict fetal movement and prevent the fetus from turning into a cephalic version, but like hydrocephalus, it is usually a one-time complication of a specific pregnancy. **Clinical Pearls for NEET-PG:** * **Most common cause of breech:** Prematurity (the fetus hasn't turned yet). * **Most common cause of *recurrent* breech:** Uterine anomalies (Septate > Bicornuate). * **Cornual implantation of the placenta** is also a known risk factor for breech. * **Management:** External Cephalic Version (ECV) is the preferred method to convert breech to cephalic at 36 weeks (primigravida) or 37 weeks (multigravida), provided there are no contraindications like a septate uterus.

Question 222: An elderly multiparous woman with intrauterine fetal death was admitted with strong labor pains. The patient suddenly goes into shock with cyanosis, respiratory disturbances, and pulmonary edema. What is the most likely clinical diagnosis?

A. Rupture of uterus
B. Congestive heart failure
C. Amniotic fluid embolism (Correct Answer)
D. Concealed accidental hemorrhage

Explanation: ### Explanation The clinical presentation described is a classic triad of **Amniotic Fluid Embolism (AFE)**: sudden cardiovascular collapse (shock), respiratory distress (cyanosis/dyspnea), and coagulopathy. **Why Amniotic Fluid Embolism is correct:** AFE is a rare but catastrophic obstetric emergency. It occurs when amniotic fluid, fetal cells, or debris enter the maternal circulation, triggering an anaphylactoid-like systemic inflammatory response. * **Risk Factors:** The patient is an **elderly multipara** with **strong labor pains** and **intrauterine fetal death (IUFD)**—all of which are classic risk factors for AFE. * **Clinical Signs:** The sudden onset of shock, cyanosis, and pulmonary edema during labor is hallmark. It often leads to DIC and severe hemorrhage if the patient survives the initial cardiorespiratory phase. **Why other options are incorrect:** * **Rupture of Uterus:** While it causes shock and severe pain, it typically presents with a loss of fetal station, cessation of contractions, and abdominal tenderness rather than primary respiratory failure and pulmonary edema. * **Congestive Heart Failure:** Though it causes pulmonary edema, it is usually gradual or associated with pre-existing heart disease (like mitral stenosis) and does not typically present with sudden, profound cyanotic shock during active labor. * **Concealed Accidental Hemorrhage (Abruptio Placentae):** This presents with a "woody hard" uterus and shock out of proportion to visible blood loss. However, it does not typically cause sudden respiratory collapse or pulmonary edema as the primary event. **NEET-PG High-Yield Pearls:** * **Most common site of entry:** Endocervical veins or the placental site. * **Diagnosis:** Primarily clinical (diagnosis of exclusion). Squamous cells in the maternal pulmonary circulation on autopsy are suggestive but not pathognomonic. * **Management:** Immediate supportive care (A-B-C: Airway, Breathing, Circulation). There is no specific treatment. * **Key Association:** Strong uterine contractions (often due to oxytocin use) and IUFD are major triggers.

Question 223: The management of eclampsia includes all except?

A. Control of convulsions
B. Prolongation of pregnancy (Correct Answer)
C. Control of blood pressure
D. Delivery of the fetus

Explanation: **Explanation:** The definitive treatment for eclampsia is the **delivery of the fetus and placenta**, as the pathology originates from placental dysfunction. Once a patient develops eclampsia (generalized tonic-clonic seizures), it is considered an obstetric emergency. **1. Why "Prolongation of pregnancy" is the correct answer (The Exception):** In eclampsia, the goal is stabilization followed by prompt delivery, regardless of gestational age. **Prolongation of pregnancy is contraindicated** because it increases the risk of life-threatening maternal complications such as placental abruption, hepatic rupture, renal failure, and maternal death. Expectant management is only sometimes considered in *pre-eclampsia* far from term, but never in *eclampsia*. **2. Analysis of Incorrect Options:** * **Control of convulsions:** This is the immediate priority. **Magnesium Sulfate (MgSO₄)** is the drug of choice (Pritchard’s or Zuspan’s regimen) to arrest and prevent further seizures. * **Control of blood pressure:** Severe hypertension (≥160/110 mmHg) must be managed to prevent intracranial hemorrhage. Common agents include Labetalol, Hydralazine, or Nifedipine. * **Delivery of the fetus:** This is the only "cure." Once the mother is stabilized (airway secured, seizures controlled, BP lowered), delivery should be initiated. **Clinical Pearls for NEET-PG:** * **Drug of Choice:** MgSO₄ is superior to Diazepam or Phenytoin for eclampsia. * **Therapeutic Range of MgSO₄:** 4–7 mEq/L. * **Toxicity Check:** Always monitor patellar reflex (first to disappear), respiratory rate (>12/min), and urine output (>30ml/hr). * **Antidote:** Calcium Gluconate (10ml of 10% solution IV). * **Mode of Delivery:** Eclampsia is not an absolute indication for Cesarean section; vaginal delivery is preferred if the cervix is favorable and the maternal-fetal status is stable.

Question 224: A 25-year-old G2P2 patient with B negative blood group presents in active labor and is fully dilated. Which of the following standard procedures should NOT be followed in this patient?

A. Cord blood should be saved in both plain and EDTA tubes.
B. Early clamping of the umbilical cord.
C. Avoidance of manual removal of the placenta.
D. Liberal prophylactic use of ergometrine. (Correct Answer)

Explanation: ### Explanation The primary goal in managing a Rh-negative mother during labor is to **prevent feto-maternal hemorrhage (FMH)**, which can lead to isoimmunization. **Why Option D is the Correct Answer:** The use of **Ergometrine** (especially intravenously) for the active management of the third stage of labor is avoided in Rh-negative patients. Ergometrine causes **tonic uterine contractions**, which can force fetal blood into the maternal circulation (retrograde flow) through the placental site, significantly increasing the risk of feto-maternal micro-transfusion and subsequent sensitization. Oxytocin is the preferred uterotonic as it produces rhythmic contractions. **Analysis of Incorrect Options:** * **Option A:** Cord blood must be collected to determine the newborn's blood group, Rh status, and to perform a Direct Coombs Test (DCT). EDTA is used for blood grouping, while plain tubes are used for cross-matching or bilirubin levels if needed. * **Option B:** **Early clamping** of the umbilical cord is recommended in Rh-negative pregnancies. This prevents the "milking" of fetal blood from the placenta back into the fetal circulation or potentially into the maternal sinuses during placental separation. * **Option C:** **Manual removal of the placenta** is a high-risk procedure for FMH. It should be avoided unless absolutely necessary (e.g., retained placenta with hemorrhage) to minimize trauma to the placental site. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Dose:** 300 mcg of Anti-D immunoglobulin neutralizes 15 ml of fetal RBCs (or 30 ml of whole fetal blood). * **Kleihauer-Betke Test:** Used to quantify the volume of FMH to determine if additional doses of Anti-D are required. * **Timing:** Anti-D should be administered within **72 hours** of delivery. * **Prophylaxis:** Routine antenatal Anti-D prophylaxis (RAADP) is typically given at **28 weeks** gestation.

Question 225: Which drug is NOT used in the management of postpartum hemorrhage (PPH)?

A. Mifepristone (Correct Answer)
B. Misoprostol
C. Oxytocin
D. Ergotamine

Explanation: Postpartum hemorrhage (PPH) is primarily managed using **uterotonics**, which are drugs that stimulate uterine contractions to compress bleeding vessels at the placental site. **Explanation of the Correct Answer:** * **A. Mifepristone:** This is a **progesterone receptor antagonist**. It is used for the medical termination of pregnancy (MTP), cervical ripening, and induction of labor. It acts by sensitizing the myometrium to prostaglandins and softening the cervix. It does not cause the rapid, sustained uterine contractions required to arrest acute bleeding in PPH. Therefore, it has no role in the emergency management of PPH. **Explanation of Incorrect Options (Drugs used in PPH):** * **B. Misoprostol (PGE1):** A prostaglandin analogue often used in PPH (dose: 600–800 mcg sublingually or rectally) when oxytocin is unavailable or ineffective. * **C. Oxytocin:** The **first-line drug** for both the prevention and treatment of PPH. It acts rapidly to produce rhythmic uterine contractions. * **D. Ergotamine (Methylergometrine):** An ergot alkaloid that causes tetanic uterine contractions. It is a potent second-line agent but is contraindicated in patients with hypertension or pre-eclampsia. **High-Yield Clinical Pearls for NEET-PG:** 1. **Active Management of Third Stage of Labor (AMTSL):** The most important step to prevent PPH; 10 IU of IM Oxytocin is the drug of choice. 2. **Carboprost (15-methyl PGF2α):** A potent uterotonic used in refractory PPH; contraindicated in **Asthma**. 3. **Methylergometrine:** Contraindicated in **Hypertension** and heart disease. 4. **Surgical Management:** If medical management fails, the next steps include uterine artery embolization, B-Lynch sutures, or internal iliac artery ligation.

Question 226: On per vaginal examination during the second stage of labor, the anterior fontanelle and supraorbital ridge are palpable. What is the presentation?

A. Brow presentation (Correct Answer)
B. Deflexed head
C. Flexed head
D. Face presentation

Explanation: In obstetrics, the **presentation** is determined by the relationship between the fetal landmark (denominator) and the birth canal. ### Why Brow Presentation is Correct **Brow presentation** occurs when the fetal head is in a state of **partial extension** (midway between full flexion and full extension). On per vaginal (PV) examination, the diagnostic landmarks are the **anterior fontanelle (bregma)** at one end and the **supraorbital ridges/eyebrows** at the other. The nose and eyes may also be palpable, but the chin (mentum) is not. This is the most unfavorable presentation for vaginal delivery because the engaging diameter is the **mentovertical (13.5 cm)**, which exceeds the average diameters of the pelvic inlet. ### Why Other Options are Incorrect * **B. Deflexed head:** Also known as a vertex presentation with a military attitude. The landmark is the **anterior fontanelle**, but the supraorbital ridges are not reachable. * **C. Flexed head:** This is the normal vertex presentation. The **posterior fontanelle (lambda)** is the leading landmark, and the chin is tucked against the chest. * **D. Face presentation:** This occurs during **complete extension**. The landmarks include the mouth, nose, malar bones, and the **mentum (chin)**. The supraorbital ridges are palpable, but the anterior fontanelle is not. ### NEET-PG High-Yield Pearls * **Engaging Diameter:** Brow = Mentovertical (13.5 cm); Face = Submentobregmatic (9.5 cm); Vertex = Suboccipitobregmatic (9.5 cm). * **Management:** A persistent brow presentation cannot deliver vaginally; **Cesarean section** is usually indicated. * **Mnemonic:** If you feel the **B**row, you feel the **B**regma (Anterior Fontanelle). If you feel the **F**ace, you feel the **F**eatures (Mouth/Chin).

Question 227: Which of the following is NOT a consequence of shoulder dystocia?

A. Sternomastoid swelling
B. Erb's palsy
C. Klumpke's paralysis
D. None of the above (Correct Answer)

Explanation: **Explanation:** Shoulder dystocia is an obstetric emergency where the fetal head is delivered, but the anterior shoulder becomes impacted behind the maternal symphysis pubis. This necessitates maneuvers that can exert significant traction or pressure on the fetus, leading to various birth injuries. **Why "None of the above" is correct:** The question asks which option is **NOT** a consequence. Since all three listed conditions (Sternomastoid swelling, Erb’s palsy, and Klumpke’s paralysis) are recognized complications of shoulder dystocia, the correct choice is "None of the above." * **Erb’s Palsy (Option B):** This is the most common neurological injury, involving the **C5-C6** nerve roots. It results from excessive lateral traction on the neck, leading to the characteristic "waiter's tip" deformity. * **Klumpke’s Paralysis (Option C):** A less common injury involving the **C8-T1** nerve roots, often occurring when the arm is hyperextended during delivery. It results in a "claw hand" deformity. * **Sternomastoid Swelling (Option A):** Also known as a sternocleidomastoid tumor or fibromatosis colli, this occurs due to muscular injury or hematoma formation within the muscle during a difficult delivery. It can lead to congenital muscular torticollis. **High-Yield Clinical Pearls for NEET-PG:** * **Turtle Sign:** The retraction of the fetal head against the perineum; the hallmark clinical sign of shoulder dystocia. * **McRoberts Maneuver:** The first-line management step (hyperflexion of maternal thighs). * **Zavanelli Maneuver:** Cephalic replacement back into the pelvis for Cesarean delivery; used as a last resort. * **Fractures:** Clavicular and humeral fractures are common non-neurological bony injuries associated with this condition.

Question 228: A 28-year-old G2P1 female has a history of a previous preterm birth at 32 weeks. What is the approximate percentage chance of preterm birth in this pregnancy?

A. 15% (Correct Answer)
B. 5%
C. 10%
D. 25%

Explanation: **Explanation:** The single most significant risk factor for preterm birth (PTB) is a **history of a previous spontaneous preterm birth**. The risk of recurrence is inversely proportional to the gestational age of the previous delivery; the earlier the previous birth, the higher the risk for the current pregnancy. 1. **Why 15% is correct:** In a woman with one prior preterm birth, the risk of recurrence in the subsequent pregnancy is approximately **15% to 17%**. Statistically, a history of one PTB increases the baseline risk by nearly three-fold compared to a woman with a history of a full-term delivery. 2. **Why other options are incorrect:** * **5%:** This is lower than the baseline risk for the general population (which is roughly 10-12%). * **10%:** This represents the average baseline risk for a primigravida or a woman with a previous term delivery, not someone with a high-risk history. * **25%:** This higher risk (approx. 30-32%) is typically seen in women who have had **two** previous preterm births, rather than just one. **High-Yield Clinical Pearls for NEET-PG:** * **Prophylaxis:** For patients with a history of spontaneous PTB, the standard of care is **Progesterone supplementation** (starting at 16–24 weeks) and serial **Cervical Length (CL) monitoring** via TVS. * **Cervical Cerclage:** Indicated if the cervical length is **<25 mm** before 24 weeks in a woman with a history of PTB. * **Recurrence Risk Rule of Thumb:** * 1 previous PTB: ~15% risk. * 2 previous PTBs: ~30% risk. * 3 previous PTBs: ~45% risk.

Question 229: The best method of managing the second stage of labor in a patient with heart disease is by?

A. Prophylactic forceps
B. Prophylactic ventouse (Correct Answer)
C. Spontaneous delivery with episiotomy
D. Cesarean section

Explanation: **Explanation:** In patients with heart disease, the primary goal during labor is to **shorten the second stage** to minimize maternal exhaustion and prevent the deleterious hemodynamic effects of prolonged "bearing down" (Valsalva maneuver). **1. Why Prophylactic Ventouse is Correct:** The current clinical consensus (and the preferred answer in recent NEET-PG patterns) favors **prophylactic vacuum extraction (ventouse)** over forceps. The vacuum is considered less traumatic to the maternal soft tissues and requires less anesthesia. By applying the ventouse as soon as the cervix is fully dilated and the head is at an appropriate station, the clinician provides "assisted" delivery, effectively eliminating the need for the mother to perform strenuous voluntary pushing, which significantly reduces cardiac workload and the risk of acute heart failure. **2. Analysis of Incorrect Options:** * **Prophylactic Forceps (A):** While historically favored, forceps require higher levels of anesthesia and carry a greater risk of vaginal/perineal lacerations compared to the ventouse. * **Spontaneous Delivery with Episiotomy (C):** Allowing a spontaneous delivery requires the mother to push actively. The Valsalva maneuver increases intrathoracic pressure, decreases venous return, and causes sudden fluctuations in cardiac output, which can be fatal in severe heart disease. * **Cesarean Section (D):** Heart disease is **not** an indication for C-section. Surgery involves significant fluid shifts, blood loss, and anesthetic risks. Vaginal delivery is always preferred unless there is an obstetric indication. **Clinical Pearls for NEET-PG:** * **Most dangerous period:** The immediate postpartum period (third stage) is the most critical due to "autotransfusion" from the involuting uterus, which can lead to sudden pulmonary edema. * **Positioning:** Labor should be conducted in the **left lateral recumbent position** to optimize cardiac output. * **Antibiotics:** Prophylaxis for infective endocarditis is no longer routine for uncomplicated vaginal deliveries unless there is an active infection.

Question 230: Which of the following information is NOT obtained by lateral plate X-ray pelvimetry?

A. Sacral curve
B. True conjugate
C. Bispinous diameter (Correct Answer)
D. Inclination of the pelvis

Explanation: **Explanation:** Pelvimetry is the assessment of the female pelvis in relation to the birth of a baby. To understand this question, one must visualize the pelvis in a **sagittal (lateral) view** versus a **transverse (frontal/superior) view**. **Why Bispinous Diameter is the correct answer:** The **bispinous diameter** (interspinous diameter) is the distance between the two ischial spines. In a lateral X-ray, the two ischial spines are superimposed on top of each other. Therefore, you cannot measure the horizontal distance between them. This diameter can only be measured using an **Anteroposterior (AP) view** or via clinical vaginal examination. It is the shortest diameter of the pelvic canal (typically 10.5 cm). **Analysis of Incorrect Options:** * **Sacral Curve:** A lateral view provides a clear profile of the sacrum, allowing for the assessment of whether it is well-curved, flat, or j-shaped. * **True Conjugate:** This is the distance from the upper margin of the symphysis pubis to the sacral promontory. Since both these points lie in the midline sagittal plane, they are easily measured on a lateral plate. * **Inclination of the Pelvis:** This refers to the angle formed by the plane of the pelvic inlet with the horizontal line. This angular relationship is only visible from the side (lateral view). **High-Yield Clinical Pearls for NEET-PG:** 1. **Obstetric Conjugate:** The most important diameter of the inlet; it is the shortest AP diameter (approx. 10 cm). 2. **Diagonal Conjugate:** The only AP diameter that can be measured **clinically** via per-vaginal exam. 3. **Thoms’ Pelvimetry:** A radiological method used to measure the pelvic capacity. 4. **Note:** Routine X-ray pelvimetry is now largely obsolete in modern obstetrics due to radiation risks and poor predictive value for cephalopelvic disproportion (CPD), but it remains a classic exam topic.

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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