Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 461: Which of the following risk factors is most commonly associated with chorioamnionitis?

A. Maternal drug abuse
B. Poor maternal hygiene
C. Prior cesarean delivery
D. Prolonged rupture of membranes (Correct Answer)

Explanation: **Explanation:** **Chorioamnionitis** (intra-amniotic infection) is an inflammation of the fetal membranes and amniotic fluid, typically caused by an ascending polymicrobial infection from the vaginal flora. **Why Option D is Correct:** **Prolonged rupture of membranes (PROM)** is the single most significant risk factor for chorioamnionitis. Once the protective physical barrier of the amniotic sac is breached, the sterile intrauterine environment is exposed to vaginal pathogens (e.g., *E. coli*, Group B Streptococcus). The risk increases linearly with the **duration of the latent period** (the time between rupture and delivery), especially if it exceeds 18–24 hours. Frequent digital vaginal examinations after ROM further exacerbate this risk by manually introducing bacteria into the cervical canal. **Why Other Options are Incorrect:** * **A & B (Maternal drug abuse/Poor hygiene):** While these may be associated with poor prenatal care or increased risk of STIs, they are not direct or primary independent risk factors for the development of chorioamnionitis. * **C (Prior cesarean delivery):** This is a risk factor for uterine rupture or placenta accreta spectrum in subsequent pregnancies, but it does not predispose a patient to intra-amniotic infection. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Diagnosis (Gibbs’ Criteria):** Maternal fever (>39.0°C or 102.2°F) PLUS at least two of: Maternal tachycardia, Fetal tachycardia (>160 bpm), Uterine tenderness, or Foul-smelling liquor. * **Management:** Prompt initiation of broad-spectrum IV antibiotics (Ampicillin + Gentamicin) and **expedited delivery** (regardless of gestational age). Chorioamnionitis is *not* a contraindication to vaginal delivery. * **Gold Standard Diagnosis:** Histopathological examination of the placenta and membranes after delivery.

Question 462: Which of the following is NOT done during the third stage of labor?

A. Injection of ergometrine
B. Cord clamping (Correct Answer)
C. Massage of uterus
D. Injection of oxytocin

Explanation: The **third stage of labor** begins immediately after the delivery of the fetus and ends with the delivery of the placenta and membranes. ### Why "Cord Clamping" is the Correct Answer In modern obstetric practice, **cord clamping** (specifically delayed cord clamping) is considered a component of the **second stage of labor** (delivery of the baby) or the transition between the second and third stages. While it occurs chronologically close to the third stage, the third stage technically commences *after* the baby is born. In the context of Active Management of the Third Stage of Labor (AMTSL), the focus is on placental delivery and prevention of Postpartum Hemorrhage (PPH). ### Explanation of Incorrect Options * **Injection of Oxytocin (Option D):** This is the **drug of choice** for AMTSL. It is administered (10 IU IM/IV) immediately after the delivery of the anterior shoulder or the baby to promote uterine contraction. * **Injection of Ergometrine (Option A):** While oxytocin is preferred, ergometrine is a potent uterotonic used in the third stage to prevent or treat PPH (contraindicated in hypertensive patients). * **Massage of Uterus (Option C):** Fundal massage is performed *after* the delivery of the placenta to ensure the uterus remains contracted (hard as a "cricket ball") and to prevent atonic PPH. ### NEET-PG High-Yield Pearls * **AMTSL Components:** 1. Uterotonic administration (Oxytocin), 2. Controlled Cord Traction (Modified Brandt-Andrews maneuver), 3. Uterine massage. * **Delayed Cord Clamping:** Now recommended for at least 60 seconds in term/preterm neonates to improve iron stores and reduce intraventricular hemorrhage. * **Duration:** The third stage is considered prolonged if it exceeds **30 minutes**. * **Signs of Placental Separation:** 1. Gush of blood, 2. Lengthening of the cord, 3. Uterus becomes globular and firm (Schroeder's sign).

Question 463: Perineal injury can be prevented in vaginal delivery by all of the following EXCEPT:

A. Maintaining flexion of the head
B. Timely episiotomy as a routine (Correct Answer)
C. Slow delivery of the head in between contractions
D. Effective perineal guard

Explanation: The goal of perineal management during delivery is to minimize trauma. Modern obstetric practice has shifted away from the traditional belief that routine episiotomy prevents severe perineal tears. **Why "Timely episiotomy as a routine" is the correct answer:** Current evidence-based guidelines (ACOG and RCOG) recommend **restrictive** rather than routine episiotomy. Routine episiotomy does not prevent third- or fourth-degree perineal tears; in fact, it is associated with an *increased* risk of deep tears, higher blood loss, and postpartum dyspareunia. It should only be performed for specific indications, such as fetal distress, instrumental delivery, or an imminent large tear. **Explanation of other options (Methods to prevent injury):** * **Maintaining flexion of the head:** By keeping the head flexed (Ritgen’s maneuver), the smaller **suboccipitobregmatic diameter (9.5 cm)** is presented to the vaginal outlet instead of larger diameters, reducing the stretch on the perineum. * **Slow delivery of the head in between contractions:** Delivering the head slowly and controlledly between contractions allows the perineal tissues to stretch gradually, reducing the risk of sudden "explosive" tearing. * **Effective perineal guard:** Supporting the perineum manually (perineal protection) helps control the speed of crowning and stabilizes the tissue, significantly reducing the incidence of high-grade tears. **High-Yield Clinical Pearls for NEET-PG:** * **Mediolateral episiotomy** is preferred over midline episiotomy in India to reduce the risk of extension into the anal sphincter. * **Ritgen’s Maneuver:** Forward pressure on the fetal chin through the maternal perineum to control delivery and maintain flexion. * **Degrees of Perineal Tears:** * 1st: Skin only. * 2nd: Perineal muscles. * 3rd: Anal sphincter involved. * 4th: Rectal mucosa involved.

Question 464: In all of the following indications for Cesarean sections, a lower segment Cesarean section is preferred over a classical one, except:

A. Fetal distress in the first stage of labor
B. Severe degree of contracted pelvis
C. Carcinoma of the cervix (Correct Answer)
D. Previous two Cesarean sections

Explanation: **Explanation:** The choice between a Lower Segment Cesarean Section (LSCS) and a Classical Cesarean Section (CCS) depends on the surgical accessibility of the lower segment and the need to avoid specific pathology. **Why Carcinoma of the Cervix is the correct answer:** In cases of invasive cervical cancer, a **Classical Cesarean Section** is preferred. Performing an LSCS is contraindicated because the lower uterine segment is in close proximity to the malignant growth. An incision here can lead to: 1. **Severe Hemorrhage:** Due to the increased vascularity associated with the tumor. 2. **Tumor Dissemination:** Risk of cutting through or traumatizing the cancerous tissue, potentially spreading malignant cells. 3. **Obstruction:** The tumor may physically obstruct the lower segment, making a standard incision impossible. Often, this is followed by a Radical Hysterectomy (Wertheim’s operation) in the same sitting. **Analysis of Incorrect Options:** * **Fetal Distress:** LSCS is the standard of care. It allows for quicker healing, less blood loss, and a lower risk of rupture in future pregnancies compared to CCS. * **Severe Contracted Pelvis:** While the baby cannot pass vaginally, the lower segment of the uterus remains the safest site for incision. * **Previous Two CS:** Unless there are dense adhesions making the lower segment completely inaccessible, an LSCS is still preferred to minimize the high risk of uterine rupture associated with classical scars. **High-Yield Clinical Pearls for NEET-PG:** * **Indications for Classical CS:** Carcinoma cervix, impacted transverse lie (back down), peripartum hysterectomy (e.g., placenta accreta), and extremely preterm fetus with an undeveloped lower segment. * **Uterine Rupture Risk:** The risk of rupture in a subsequent pregnancy is **4–9% for a Classical scar** vs. **0.2–1.5% for an LSCS scar**. * **Incision Site:** LSCS involves a transverse incision in the thin lower segment; CCS involves a vertical incision in the thick upper muscular segment.

Question 465: Which of the following is not an etiology of umbilical cord prolapse?

A. Contracted pelvis
B. Hydramnios
C. Placenta previa
D. Dextrorotated uterus (Correct Answer)

Explanation: **Explanation:** Umbilical cord prolapse occurs when the cord descends below or alongside the presenting part after the rupture of membranes. The fundamental pathophysiology involves a **poor fit** between the presenting part and the pelvic inlet, leaving space for the cord to slip through. **1. Why Dextrorotated Uterus is the Correct Answer:** Dextrorotation (the slight clockwise rotation of the uterus toward the right due to the presence of the rectosigmoid colon on the left) is a **normal physiological finding** in pregnancy. It does not interfere with the engagement of the fetal head or create gaps at the pelvic inlet; therefore, it is not an etiological factor for cord prolapse. **2. Analysis of Incorrect Options:** * **Contracted Pelvis:** This prevents the fetal head from engaging properly in the pelvic brim. The resulting "high-floating" head leaves ample space for the cord to prolapse when membranes rupture. * **Hydramnios:** The excessive volume of amniotic fluid creates high hydrostatic pressure. When membranes rupture, the sudden gush of fluid can wash the cord down past the presenting part. * **Placenta Previa:** A low-lying placenta can physically prevent the presenting part from deeply engaging in the lower uterine segment, creating a gap that predisposes to cord prolapse. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** Malpresentations (specifically Footling Breech). * **Most common fetal presentation associated:** Transverse lie. * **Immediate Management:** Place the patient in the **Trendelenburg or Knee-chest position** and manually displace the presenting part upward to relieve cord compression until an emergency Cesarean section can be performed. * **Diagnosis:** Sudden fetal bradycardia or variable decelerations following the rupture of membranes should always raise suspicion of cord prolapse.

Question 466: What are the clinical manifestations of amniotic fluid embolism?

A. Shock
B. Disseminated intravascular coagulation (DIC)
C. Bleeding tendency
D. All of the above (Correct Answer)

Explanation: **Explanation:** Amniotic Fluid Embolism (AFE) is a rare but catastrophic obstetric emergency characterized by the entry of amniotic fluid, fetal cells, and debris into the maternal circulation. This triggers a massive anaphylactoid reaction rather than a simple mechanical obstruction. **Why "All of the above" is correct:** The clinical presentation of AFE typically follows a classic triad: 1. **Shock:** Patients experience sudden cardiovascular collapse and profound hypotension. This is often preceded by respiratory distress and cyanosis due to acute pulmonary hypertension and right heart failure. 2. **Disseminated Intravascular Coagulation (DIC):** Amniotic fluid contains high concentrations of tissue factor, which activates the extrinsic coagulation pathway. This leads to rapid, consumptive coagulopathy in up to 80% of cases. 3. **Bleeding Tendency:** As a direct consequence of DIC and uterine atony, patients develop severe, uncontrollable hemorrhage (often from the placental site or surgical incisions). **Analysis of Options:** * **Options A, B, and C** are all hallmark features of the condition. Selecting only one would be incomplete, as they usually occur in rapid succession or simultaneously during the "second phase" of the embolism. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** Advanced maternal age, multiparity, hyperstimulation of the uterus (oxytocin), and instrumental delivery. * **Diagnosis:** Primarily a **clinical diagnosis of exclusion**. Definitive diagnosis (often post-mortem) shows fetal squames or lanugo in the maternal pulmonary vasculature. * **Management:** Immediate supportive care (A-B-C). There is no specific antidote. Use the **"A-OK" protocol** (Atropine, Ondansetron, and Ketorolac) is a modern experimental approach mentioned in recent literature. * **Prognosis:** High maternal mortality rate (up to 60-80%).

Question 467: Disseminated Intravascular Coagulation (DIC) may be caused by?

A. Prolonged pregnancy
B. Fat embolism
C. Amniotic fluid embolism (Correct Answer)
D. All of the above

Explanation: **Explanation:** **Correct Answer: C. Amniotic fluid embolism** **Why it is correct:** Amniotic fluid embolism (AFE) is a catastrophic obstetric emergency where amniotic fluid, fetal cells, and debris enter the maternal circulation. This triggers a massive inflammatory response and systemic activation of the coagulation cascade. The fluid contains high concentrations of **tissue factor**, which activates Factor VII, leading to explosive thrombin generation and consumption of clotting factors. This results in **consumptive coagulopathy** or Disseminated Intravascular Coagulation (DIC), often presenting as uncontrollable hemorrhage immediately following cardiovascular collapse. **Why the other options are incorrect:** * **A. Prolonged pregnancy:** Post-term pregnancy (≥42 weeks) is associated with macrosomia and oligohydramnios but does not inherently trigger DIC. However, **intrauterine fetal death (IUFD)**, if retained for more than 4 weeks, can lead to DIC due to the release of thromboplastin from the dead fetus. * **B. Fat embolism:** While fat embolism can cause respiratory distress and petechiae (typically post-fracture), it is not a standard cause of DIC in the obstetric context. In pregnancy, the primary "embolic" cause of DIC is amniotic fluid. **High-Yield Clinical Pearls for NEET-PG:** * **Commonest cause of DIC in pregnancy:** Abruptio Placentae (due to release of retroplacental thromboplastin). * **Classic Triad of AFE:** Sudden hypoxia/respiratory distress, hypotension, and coagulopathy (DIC). * **Other Obstetric Causes of DIC:** Severe Preeclampsia/HELLP syndrome, Septic abortion, and Acute Fatty Liver of Pregnancy (AFLP). * **Management:** DIC is managed by treating the underlying cause and aggressive blood component therapy (FFP, Platelets, and Cryoprecipitate).

Question 468: A pregnant woman presents at 22 weeks gestation for a routine prenatal visit. Physical examination demonstrates ankle edema and new onset hypertension. Urinalysis reveals marked proteinuria. Development of which of the following would justify a diagnosis of eclampsia?

A. Diabetes mellitus
B. Hyperuricemia
C. Seizures (Correct Answer)
D. Systemic lupus erythematosus

Explanation: ### Explanation **Correct Answer: C. Seizures** The clinical presentation of new-onset hypertension and marked proteinuria after 20 weeks of gestation defines **Preeclampsia**. The progression from preeclampsia to **Eclampsia** is defined specifically by the occurrence of **generalized tonic-clonic seizures** that cannot be attributed to other neuropsychiatric causes (e.g., epilepsy or brain tumors). In this patient at 22 weeks, the presence of the "classic triad" (hypertension, proteinuria, and edema) points toward preeclampsia. The development of seizures is the pathognomonic feature that justifies the diagnosis of eclampsia. **Why other options are incorrect:** * **A. Diabetes mellitus:** While a risk factor for developing preeclampsia, it is a metabolic disorder and not a diagnostic criterion for eclampsia. * **B. Hyperuricemia:** Elevated serum uric acid is a common finding in preeclampsia due to decreased renal clearance and is often used as a marker of disease severity, but it does not define eclampsia. * **D. Systemic lupus erythematosus (SLE):** SLE can mimic preeclampsia (lupus nephritis) or coexist with it, but it is an autoimmune pathology, not a diagnostic stage of hypertensive disorders of pregnancy. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Eclampsia = Preeclampsia + Seizures. * **Drug of Choice (DOC):** **Magnesium Sulfate ($MgSO_4$)** is the DOC for both the prophylaxis and control of eclamptic seizures (Pritchard Regimen). * **Antidote:** Always keep **Calcium Gluconate** (10 ml of 10% solution) ready at the bedside to treat $MgSO_4$ toxicity. * **Timing:** Eclampsia can occur antepartum (50%), intrapartum (25%), or postpartum (25%). * **Management:** The definitive treatment for eclampsia, regardless of gestational age, is the **stabilization of the mother followed by delivery.**

Question 469: Cesarean section is preferred in which of the following conditions?

A. Toxoplasmosis
B. Herpes (Correct Answer)
C. Cytomegalovirus (CMV)
D. Varicella zoster virus

Explanation: **Explanation:** The primary goal of selecting the mode of delivery in viral infections is to prevent vertical transmission. **Why Herpes (HSV) is the correct answer:** Cesarean section (CS) is indicated in patients with **active genital herpes lesions** or prodromal symptoms (burning, itching) at the time of labor. This is because the risk of neonatal herpes—a devastating condition involving the CNS and disseminated organs—is highest (approx. 50%) during vaginal delivery through an infected birth canal, especially in primary infections. Elective CS significantly reduces this risk of transmission. **Why the other options are incorrect:** * **Toxoplasmosis:** Transmission is primarily **transplacental** (in utero). Mode of delivery does not significantly alter the risk of transmission; therefore, CS is not routinely indicated. * **Cytomegalovirus (CMV):** Like Toxoplasmosis, CMV is mostly transmitted **transplacentally** or via breast milk. While it can be found in vaginal secretions, CS has not been proven to prevent neonatal infection, making vaginal delivery the standard approach. * **Varicella Zoster Virus (VZV):** Maternal varicella near term poses a risk of neonatal varicella due to transplacental spread. Management involves administering VZIG to the neonate and acyclovir to the mother; CS is not indicated for preventing transmission. **High-Yield Clinical Pearls for NEET-PG:** * **Acyclovir Prophylaxis:** In women with recurrent HSV, oral acyclovir is typically started at **36 weeks gestation** to suppress outbreaks and reduce the need for CS. * **Timing:** If a patient has active lesions, CS should ideally be performed **before** rupture of membranes or within 4–6 hours of rupture. * **HIV & CS:** CS is indicated if the viral load is **>1,000 copies/mL** near delivery. * **Hepatitis B/C:** These are **not** indications for CS; vaginal delivery is safe.

Question 470: Which prostaglandin helps in cervical ripening?

A. Prostaglandin I2 (PGI2)
B. Prostaglandin F2 (PGF2)
C. Prostaglandin E2 (PGE2) (Correct Answer)
D. Prostaglandin D2 (PGD2)

Explanation: **Explanation:** **Prostaglandin E2 (PGE2)**, also known as **Dinoprostone**, is the gold standard pharmacological agent used for cervical ripening. Cervical ripening involves the biochemical breakdown of collagen fibers and an increase in submucosal water content (glycosaminoglycans), which softens and thins the cervix (effacement). PGE2 acts by stimulating the enzyme collagenase and altering the extracellular matrix, making the cervix favorable for induction of labor. **Analysis of Options:** * **Prostaglandin E2 (PGE2):** Correct. It specifically targets cervical connective tissue. Common clinical forms include intracervical gels (Prepidil) or vaginal inserts (Cervidil). * **Prostaglandin F2α (PGF2α):** Incorrect. While it is a potent uterine stimulant (oxytocic), its primary clinical use is in the management of **Postpartum Hemorrhage (PPH)** (e.g., Carboprost) due to its ability to cause strong myometrial contractions. It is not used for ripening. * **Prostaglandin I2 (PGI2):** Also known as Prostacyclin. It is a potent vasodilator and inhibitor of platelet aggregation; it does not play a role in cervical ripening. * **Prostaglandin D2 (PGD2):** This is primarily involved in allergic and inflammatory responses (mast cell mediator) and sleep regulation, with no role in obstetrics. **High-Yield Clinical Pearls for NEET-PG:** * **PGE1 (Misoprostol):** Also used for cervical ripening and induction. It is cheaper and more stable than PGE2 but carries a higher risk of uterine tachysystole. * **Bishop Score:** The clinical tool used to assess the "readiness" of the cervix. A score of **≤6** indicates an unripe cervix, necessitating the use of PGE2. * **Contraindication:** Prostaglandins should be avoided in patients with a previous Cesarean section due to the increased risk of **uterine rupture**.

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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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