Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 721: In a case of aftercoming head during labor, which of the following bones is perforated during decapitation?

A. Occiput (Correct Answer)
B. Parietal
C. Palate
D. Frontal

Explanation: **Explanation:** In modern obstetrics, **destructive operations** are rarely performed, but they remain high-yield topics for NEET-PG. When the head is trapped during a breech delivery (aftercoming head) and the fetus is dead, **decapitation** or craniotomy is performed to facilitate delivery and protect the mother. **1. Why Occiput is Correct:** To reduce the size of the aftercoming head, the skull must be perforated to evacuate the brain matter. The **occipital bone** (specifically the area near the posterior fontanelle or the foramen magnum) is the preferred site for perforation. This is because, in a breech presentation, the occiput is the most accessible part of the skull when the body is born and the head is still in the birth canal. Perforating the occiput allows for the collapse of the skull bones, significantly reducing the cephalic diameter. **2. Why Other Options are Incorrect:** * **Parietal:** While the parietal bone is the site of perforation in **cephalic presentations** (vertex), it is difficult to access in an aftercoming head without risking injury to the maternal soft tissues. * **Palate:** Perforating the hard palate is a technique used in the **Smellie-Veit maneuver** for drainage, but it is not the primary site for bone perforation during formal decapitation/craniotomy procedures. * **Frontal:** The frontal bone is anterior and usually tucked behind the symphysis pubis in a standard breech delivery, making it surgically inaccessible compared to the occiput. **Clinical Pearls for NEET-PG:** * **Instrument used:** The **Blanchard’s or Simpson’s perforator** is commonly used for this procedure. * **Indication:** Destructive operations are only performed on a **dead fetus** to save the mother from obstructed labor. * **Key Landmark:** In cephalic presentations, the perforation is done through the **parietal bone** (near the anterior fontanelle). In breech (aftercoming head), it is the **occiput**.

Question 722: Which of the following drugs is not used in the treatment of preterm labor?

A. Ritodrine
B. MgSO4
C. Salbutamol
D. Chlorpromazine (Correct Answer)

Explanation: **Explanation:** The management of preterm labor involves the use of **tocolytics**, which are drugs used to suppress uterine contractions to delay delivery (ideally for 48 hours to allow for corticosteroid administration). **Why Chlorpromazine is the correct answer:** Chlorpromazine is a typical antipsychotic (phenothiazine) used primarily in psychiatry for schizophrenia or as an anti-emetic. It has **no tocolytic properties** and does not act on the uterine smooth muscle to inhibit contractions. Therefore, it has no role in the management of preterm labor. **Analysis of Incorrect Options (Tocolytic Agents):** * **Ritodrine & Salbutamol:** These are **Beta-2 adrenergic agonists**. They work by increasing intracellular cAMP, which leads to the relaxation of the uterine smooth muscle (myometrium). While effective, their use has declined due to maternal side effects like tachycardia and pulmonary edema. * **MgSO4 (Magnesium Sulfate):** It acts as a calcium antagonist, competing with calcium entry into the myometrial cells to inhibit contractions. In modern obstetrics, it is used less as a primary tocolytic and more for **fetal neuroprotection** in anticipated preterm births before 32 weeks. **NEET-PG High-Yield Pearls:** * **Drug of Choice (DOC):** Currently, **Nifedipine** (a Calcium Channel Blocker) is the first-line tocolytic due to its superior safety profile and efficacy. * **Atosiban:** A specific Oxytocin receptor antagonist used as a tocolytic with minimal side effects. * **Indomethacin:** A COX inhibitor used as a tocolytic, but contraindicated after 32 weeks due to the risk of premature closure of the *ductus arteriosus* and oligohydramnios. * **Goal of Tocolysis:** To delay delivery for 48 hours to allow **Dexamethasone/Betamethasone** to enhance fetal lung maturity.

Question 723: Which of the following are techniques for delivery of the aftercoming head in a breech presentation?

A. Burns-Marshall method
B. Forceps delivery (Correct Answer)
C. Modified Mauriceau-Smellie-Veit technique
D. Lovset's maneuver

Explanation: In breech presentation, the delivery of the **aftercoming head** is the most critical stage, as it must be performed swiftly to prevent cord compression and fetal hypoxia, yet gently to avoid intracranial hemorrhage. ### **Explanation of Options** * **Forceps delivery (Correct):** Piper’s forceps are specifically designed for the aftercoming head. They have a long perineal curve and lack a pelvic curve, allowing for controlled, symmetrical traction and flexion of the head while protecting it from the birth canal. This is often considered the safest method when manual maneuvers fail. * **Modified Mauriceau-Smellie-Veit technique:** This is a manual maneuver to deliver the aftercoming head. It involves placing the index and middle fingers on the fetal maxilla (to maintain flexion) while the other hand applies pressure on the fetal shoulders. * **Burns-Marshall method:** This technique is used for the delivery of the aftercoming head by allowing the fetus to hang by its own weight to promote flexion, followed by swinging the trunk toward the mother's abdomen. * **Lovset’s maneuver (Incorrect):** This is specifically used for the **delivery of the arms** (extended arms) in a breech presentation, not the head. It involves rotating the fetal trunk to bring the posterior shoulder anteriorly under the symphysis pubis. ### **NEET-PG High-Yield Pearls** * **Prerequisite for Aftercoming Head:** The head must be engaged and the cervix must be fully dilated. * **Piper’s Forceps:** The "Gold Standard" for instrumental delivery of the aftercoming head. * **Wigand-Martin-Winckel Maneuver:** Another manual method where one hand is in the vagina (on the jaw) and the other hand applies suprapubic pressure. * **Zavanelli Maneuver:** Cephalic replacement (pushing the fetus back into the uterus) followed by C-section; used as a last resort in catastrophic breech extraction failure.

Question 724: A 29-year-old G3 P2 female at 32 weeks of gestation presents to the emergency department with a small amount of vaginal bleeding. She does not have any pain. Fetal heart rate tracings show fetal distress and late decelerations. What is the best course of action?

A. Emergent cesarean section (Correct Answer)
B. Fetal umbilical blood transfusion
C. Expectant management
D. Induction of labor with prostaglandins

Explanation: **Explanation:** The clinical presentation of painless vaginal bleeding in the third trimester is highly suggestive of **Placenta Previa**. However, the management priority in any obstetric emergency is dictated by the maternal and fetal status. 1. **Why Option A is correct:** The presence of **fetal distress** (evidenced by late decelerations) is a critical "red flag." Regardless of the underlying cause of bleeding (previa or abruption), fetal distress at 32 weeks indicates that the fetus is not tolerating the intrauterine environment. An emergent cesarean section is the definitive management to prevent fetal demise or permanent neurological injury. 2. **Why the other options are incorrect:** * **Option B:** Fetal umbilical blood transfusion is used for fetal anemia (e.g., Rh isoimmunization), not for acute fetal distress or late decelerations. * **Option C:** Expectant management (Macafee-Johnson protocol) is only appropriate for placenta previa if the mother is hemodynamically stable, bleeding has ceased, and the **fetal heart rate is reassuring**. * **Option D:** Induction of labor is contraindicated in placenta previa (due to risk of catastrophic hemorrhage) and is inappropriate in the setting of acute fetal distress, where immediate delivery is required. **Clinical Pearls for NEET-PG:** * **Painless bleeding = Placenta Previa** until proven otherwise. **Painful bleeding = Abruptio Placentae.** * **Late Decelerations** signify uteroplacental insufficiency and are always considered "pathological" or "non-reassuring." * In any case of antepartum hemorrhage (APH), the first steps are maternal stabilization (ABC) and assessing fetal well-being. If the fetus is in distress, **immediate delivery** is the rule, irrespective of gestational age.

Question 725: A 21-year-old girl with 8 weeks of amenorrhea presents in shock. What is the most likely diagnosis?

A. Ruptured ectopic pregnancy (Correct Answer)
B. Incarcerated amnion
C. Twisted ovarian cyst
D. Threatened abortion

Explanation: **Explanation:** The clinical presentation of a young woman with **amenorrhea (8 weeks)** and sudden **hypovolemic shock** is a classic "spotter" for **Ruptured Ectopic Pregnancy** until proven otherwise. **1. Why Ruptured Ectopic Pregnancy is Correct:** In an ectopic pregnancy, the blastocyst implants outside the uterine cavity (most commonly in the ampulla of the fallopian tube). As the embryo grows, the thin-walled tube eventually ruptures, leading to massive intraperitoneal hemorrhage. This results in rapid hemodynamic collapse (shock), characterized by tachycardia, hypotension, and cold clammy skin. At 8 weeks, the size of the conceptus often exceeds the distensibility of the tube, making rupture highly likely. **2. Why Other Options are Incorrect:** * **Incarcerated Amnion:** This is not a standard clinical term. An incarcerated gravid uterus (usually occurring at 12–16 weeks) presents with urinary retention, not sudden shock. * **Twisted Ovarian Cyst:** While it causes acute pelvic pain, it rarely leads to hypovolemic shock unless there is associated rupture and massive hemorrhage, which is less common than in ectopic pregnancy. It usually presents with nausea and localized peritonitis. * **Threatened Abortion:** This presents with vaginal bleeding and mild cramping with a closed cervical os. It does not cause hemodynamic instability or shock. **Clinical Pearls for NEET-PG:** * **Golden Rule:** Any woman of reproductive age presenting with acute abdominal pain and shock is a ruptured ectopic pregnancy until proven otherwise. * **Most common site of Ectopic:** Fallopian tube (97%), specifically the **Ampulla**. * **Most common site of Rupture:** **Isthmus** (occurs early, at 6–8 weeks) due to its narrow lumen. Ampullary ruptures occur later (8–12 weeks). * **Investigation of Choice:** Transvaginal Ultrasound (TVS) showing an empty uterus with free fluid in the Pouch of Douglas (POD). * **Management:** Immediate resuscitation followed by emergency **Laparotomy** (Salpingectomy).

Question 726: What is the most common cause of uterine rupture?

A. Separation of a previous cesarean scar (Correct Answer)
B. Internal version
C. Excessive dosage of oxytocin
D. Complicated manual removal of the placenta

Explanation: **Explanation:** Uterine rupture is a life-threatening obstetric emergency. The most common cause in modern obstetrics is the **separation of a previous cesarean section scar** (Option A). This occurs because the scarred myometrium has less tensile strength than healthy tissue, making it vulnerable to dehiscence or rupture under the pressure of uterine contractions, especially during a Trial of Labor After Cesarean (TOLAC). **Analysis of Options:** * **Option A (Correct):** Previous uterine surgery, specifically a lower segment cesarean section (LSCS) or classical cesarean section, is the leading predisposing factor. Classical scars carry a much higher risk (4–9%) compared to LSCS scars (0.5–1%). * **Option B:** Internal podalic version is a traumatic obstetric maneuver used to deliver a second twin. While it is a known cause of traumatic rupture, it is rarely performed today, making it a less common cause than surgical scars. * **Option C:** Iatrogenic causes like oxytocin overstimulation can lead to hyperstimulation and rupture, but this is statistically less frequent than scar-related rupture when protocols are followed. * **Option D:** Manual removal of the placenta is associated with uterine perforation or inversion rather than a classic rupture of the uterine wall. **Clinical Pearls for NEET-PG:** * **Most common site:** Lower uterine segment (in cases of previous LSCS). * **Earliest sign:** Fetal heart rate abnormalities (typically prolonged bradycardia or variable decelerations). * **Classic clinical triad:** Sudden onset abdominal pain, "recession" of the presenting part (station moves up), and vaginal bleeding (though pain may be absent in patients with epidurals). * **Scar Dehiscence vs. Rupture:** Dehiscence is an asymptomatic separation of the old scar with intact peritoneum and no fetal distress; Rupture involves the full thickness and the visceral peritoneum, often leading to fetal expulsion into the peritoneal cavity.

Question 727: Spalding sign is a feature of:

A. Prematurity
B. Postmaturity
C. Fetal death (Correct Answer)
D. Hydrocephalus

Explanation: ### Explanation **Spalding sign** is a classic radiological sign indicative of **intrauterine fetal death (IUFD)**. It refers to the **overlapping of fetal skull bones** caused by the liquefaction of brain matter and the subsequent loss of intracranial pressure following fetal demise. This collapse of the skull vault usually becomes visible on X-ray or ultrasound approximately 4–7 days after the fetus has died. #### Analysis of Options: * **C. Fetal death (Correct):** As the brain tissue macerates after death, it no longer supports the skull bones, leading to their collapse and overlapping. This is a definitive sign of IUFD. * **A. Prematurity:** In premature fetuses, the skull bones are soft, but they do not overlap spontaneously unless there is significant molding during active labor. * **B. Postmaturity:** Post-term pregnancies are associated with increased skull calcification (hardening), making overlapping less likely. * **D. Hydrocephalus:** This condition involves an excess of cerebrospinal fluid, leading to macrocephaly and **widely spaced sutures** (the opposite of overlapping). #### High-Yield Clinical Pearls for NEET-PG: * **Other Radiological Signs of IUFD:** * **Robert’s Sign:** Appearance of gas shadows in the fetal heart and large vessels (earliest sign, appearing within 12 hours). * **Deuel’s Halo Sign:** Edema of the fetal scalp causing a "halo" appearance. * **Ball’s Sign:** Abnormal acute angulation or "crumpling" of the fetal spine. * **Gold Standard Diagnosis:** Today, the diagnosis of IUFD is confirmed by **Real-time Ultrasound** showing the permanent absence of fetal cardiac activity, rather than relying on X-ray signs like Spalding sign. * **False Positive:** Spalding sign can occasionally be seen in a living fetus during labor due to severe **molding** as the head passes through the birth canal.

Question 728: Atonic postpartum hemorrhage is not seen in which of the following conditions?

A. Multiple pregnancy
B. Hydramnios
C. Erythroblastosis fetalis (Correct Answer)
D. Prolonged labor

Explanation: ### Explanation The primary mechanism of **Atonic Postpartum Hemorrhage (PPH)** is the failure of the myometrium to contract effectively after delivery. This prevents the compression of the intramyometrial spiral arteries (the "living ligatures"), leading to excessive bleeding. **Why Erythroblastosis Fetalis is the Correct Answer:** In **Erythroblastosis fetalis** (Rh isoimmunization), the pathology involves fetal hemolysis, anemia, and hydrops. While this condition results in a **large, edematous placenta**, it does not typically cause overdistension of the uterine musculature itself. Therefore, it is not a recognized risk factor for uterine atony. **Analysis of Incorrect Options:** * **Multiple Pregnancy & Hydramnios:** Both conditions cause **marked overdistension** of the uterine muscle fibers. According to Starling’s Law (applied to the uterus), excessive stretching beyond a physiological limit leads to poor contractility (atony) after the contents are evacuated. * **Prolonged Labor:** In prolonged labor, the myometrium becomes **exhausted** due to repetitive contractions over an extended period. This muscular fatigue prevents the uterus from contracting efficiently in the third stage of labor. **NEET-PG High-Yield Pearls:** * **Most common cause of PPH:** Uterine Atony (accounts for ~80% of cases). * **Other causes of Atonic PPH:** Grand multiparity, placenta previa, uterine fibroids, and use of uterine relaxants (e.g., Halothane, Magnesium sulfate). * **Management Gold Standard:** Active Management of Third Stage of Labor (AMTSL) using Oxytocin (10 IU IM/IV). * **Surgical Step-ladder:** Uterine massage → Uterotonics → B-Lynch suture → Uterine/Iliac artery ligation → Hysterectomy (last resort).

Question 729: A 32-week pregnant patient presents with antepartum hemorrhage (APH). Her vital signs are unstable with a blood pressure of 80/60 mmHg. What is the next immediate management step?

A. Careful observation
B. Blood transfusion (Correct Answer)
C. Medical induction of labor
D. Immediate cesarean section

Explanation: ### Explanation **Correct Option: B. Blood Transfusion** In any case of Antepartum Hemorrhage (APH), the **initial priority is always maternal stabilization** (ABC: Airway, Breathing, and Circulation). This patient is hemodynamically unstable, as evidenced by a blood pressure of 80/60 mmHg, indicating significant hypovolemia. Before considering the mode of delivery or fetal status, the mother's intravascular volume must be restored to prevent hemorrhagic shock and multi-organ failure. Blood transfusion (along with aggressive crystalloid resuscitation) is the immediate step to stabilize the mother. **Why other options are incorrect:** * **A. Careful observation:** This is contraindicated in an unstable patient. Observation is only appropriate for stable patients with minor bleeding (Expectant management/Macafee-Johnson protocol). * **C. Medical induction of labor:** Induction is a secondary consideration. You cannot induce a patient who is in shock; stabilization must come first. * **D. Immediate cesarean section:** While a C-section may be necessary (especially in cases of Abruptio Placentae or Placenta Previa), performing surgery on a hypotensive, unstable patient significantly increases maternal mortality. The patient must be resuscitated *while* preparing for the theater. **High-Yield Clinical Pearls for NEET-PG:** * **The Golden Rule of APH:** "Resuscitate the mother first, then assess the fetus." * **Macafee-Johnson Protocol:** Used for expectant management in preterm stable patients (<37 weeks) to gain fetal maturity. * **Double Setup Examination:** Historically used to diagnose placenta previa in the OT; however, it is now largely replaced by Ultrasound. * **Target:** In obstetric hemorrhage, aim to maintain a urine output of >30 ml/hr and Hematocrit >30%.

Question 730: Which of the following is NOT a feature of dystocia dystrophica syndrome?

A. They have normal fertility (Correct Answer)
B. The patient is stockily built with short thighs
C. Android pelvis is common
D. Often have difficult labor

Explanation: **Dystocia Dystrophica Syndrome** is a clinical condition characterized by a specific physical habitus that predisposes a woman to difficult labor. ### **Explanation of the Correct Answer** **Option A (They have normal fertility)** is the correct answer because it is a **false** statement. Women with this syndrome typically exhibit **subfertility or a history of long periods of infertility** before their first pregnancy. This is often attributed to the underlying endocrine dysfunction and the "android" (masculine) physical characteristics associated with the syndrome. ### **Analysis of Incorrect Options** * **Option B (Stockily built with short thighs):** This is a classic feature. These patients are often obese, have a short stature, a thick "bull-neck," and short, heavy thighs. * **Option C (Android pelvis is common):** Due to the masculine physical distribution, the pelvis is typically **android** in type. This results in a narrow pubic arch and a prominent sacral promontory, which contributes to labor complications. * **Option D (Often have difficult labor):** The term "dystocia" literally means difficult labor. These patients frequently experience prolonged labor, occipito-posterior positions, and a high rate of instrumental deliveries or Cesarean sections due to the rigid soft tissues and contracted pelvis. ### **High-Yield Clinical Pearls for NEET-PG** * **Physical Features:** Look for "masculine" traits: increased facial hair, narrow subpubic angle, and a rigid perineum. * **Obstetric History:** Often elderly primigravidae (due to delayed conception). * **Labor Characteristics:** High incidence of **premature rupture of membranes (PROM)** and uterine inertia. * **Key Association:** Always associate Dystocia Dystrophica with an **Android Pelvis** and **Subfertility**.

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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