Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 261: Partogram is a graphic record of:

A. Fetal growth
B. Fetal well-being
C. Labor (Correct Answer)
D. Involution

Explanation: **Explanation:** The **Partogram** (or Partograph) is a composite graphical record of the progress of **labor** and the condition of the mother and fetus. It was first introduced by Friedman and later modified by Philpott and the WHO. **Why the correct answer is right:** The primary purpose of a partogram is to monitor the **progress of labor** by plotting cervical dilatation (in cm) and the descent of the fetal head against time. By providing a visual representation, it allows clinicians to identify deviations from the normal labor curve (e.g., protracted or arrested labor) early, facilitating timely interventions like augmentation or Cesarean section. **Why the incorrect options are wrong:** * **Fetal growth:** This is monitored antenatally using symphysis-fundal height (SFH) measurements and serial ultrasonography (biometry), not during active labor. * **Fetal well-being:** While fetal heart rate is recorded *on* the partogram, the tool's primary definition and function are to track labor progress. Fetal well-being is more specifically assessed via Non-Stress Tests (NST) or Biophysical Profiles (BPP). * **Involution:** This refers to the uterus returning to its non-pregnant state *after* delivery (postpartum). It is monitored by checking the height of the fundus during the puerperium. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Modified Partograph:** Starts at the **Active Phase** of labor (defined as **≥4 cm** cervical dilatation). * **Alert Line:** A diagonal line starting at 4 cm; if the labor curve crosses to the right of this line, it indicates slow progress. * **Action Line:** Usually 4 hours to the right of the alert line; crossing this indicates the need for critical intervention. * **Latent Phase:** In the modified WHO partograph, the latent phase is excluded to prevent unnecessary early interventions.

Question 262: What is the most effective and safe drug to control eclampsia?

A. Phenytoin
B. Magnesium sulfate (Correct Answer)
C. Diazepam
D. None of the above

Explanation: **Explanation:** **Magnesium Sulfate (MgSO₄)** is the drug of choice for both the prevention (prophylaxis) and treatment of seizures in eclampsia. It is superior to traditional anticonvulsants because it acts centrally by increasing the seizure threshold (via NMDA receptor antagonism) and peripherally by blocking neuromuscular transmission. Large-scale clinical trials, such as the **Collaborative Eclampsia Trial**, confirmed that MgSO₄ reduces the risk of recurrent seizures and maternal death more effectively than other agents. **Analysis of Incorrect Options:** * **Phenytoin (Option A):** While an effective anti-epileptic, it is less effective than MgSO₄ in preventing recurrent eclamptic seizures and is associated with a higher rate of maternal and neonatal complications. * **Diazepam (Option C):** Benzodiazepines can control acute seizures but are associated with a high risk of recurrence, maternal respiratory depression, and neonatal "Floppy Infant Syndrome." They are now only used if MgSO₄ is contraindicated or unavailable. **NEET-PG High-Yield Pearls:** * **Regimens:** The **Pritchard Regimen** (IM) and **Zuspan Regimen** (IV) are the standard protocols. * **Therapeutic Range:** 4–7 mEq/L. * **Toxicity Monitoring:** Always check for the presence of the **Patellar reflex** (first sign to disappear), Respiratory rate (>12/min), and Urine output (>30 ml/hr). * **Antidote:** **Calcium Gluconate** (10 ml of 10% solution given IV over 10 minutes). * **Mechanism:** It is also a potent vasodilator, which helps reduce cerebral vasospasm.

Question 263: In cases of Intraventricular Dilation (IVD) with transverse arrest, which of the following procedures can be performed?

A. Decapitation
B. Evisceration
C. Craniotomy (Correct Answer)
D. Cesarean section

Explanation: **Explanation:** The core clinical scenario involves a fetus with **Intraventricular Dilation (IVD)**—commonly referred to as **Hydrocephalus**—presenting with **transverse arrest**. In modern obstetrics, if the fetus is viable, a Cesarean section is preferred. However, in the context of NEET-PG questions (which often focus on classical management of obstructed labor or non-viable/malformed fetuses), **Craniotomy** is the definitive destructive procedure to facilitate vaginal delivery. **Why Craniotomy is Correct:** Hydrocephalus leads to a cephalopelvic disproportion (CPD) because the enlarged head cannot engage or descend, leading to arrest in the transverse position. A craniotomy involves perforating the skull (usually through a fontanelle or suture) to evacuate cerebrospinal fluid (CSF) or brain matter. This collapses the skull, reduces the diameter, and allows for vaginal birth, especially in cases of fetal demise or lethal malformations. **Analysis of Incorrect Options:** * **Decapitation (A):** This destructive procedure is specifically indicated for a **neglected shoulder presentation** (transverse lie) where the fetus is dead, not for a cephalic presentation with an enlarged head. * **Evisceration (B):** This involves the removal of thoracic or abdominal organs. It is indicated for fetal **ascites** or organomegaly causing dystocia, not for hydrocephalus. * **Cesarean Section (D):** While performed for viable fetuses, it is not the "procedure of choice" in classical teaching for obstructed labor due to hydrocephalus if the goal is to avoid maternal morbidity from a difficult surgery on a potentially non-viable fetus. **Clinical Pearls for NEET-PG:** * **Diagnosis:** Hydrocephalus is often suspected when the head is high and floating despite good contractions. * **Management:** If the fetus is alive, **cephalocentesis** (ultrasound-guided aspiration of CSF) can be done to allow vaginal delivery while attempting to preserve fetal life. * **Key Instrument:** The **Smellie’s Perforator** is classically used for craniotomy.

Question 264: A 37-week pregnant lady presents with a BP of 150/100 mmHg and 3+ proteinuria. On pelvic examination, the cervix is soft with 50% effacement, station is '-2', the pelvis is adequate, and the cervical os is 1 cm dilated. What is the most appropriate next step?

A. Observation with monitoring of blood pressure
B. Antihypertensives and await spontaneous labor
C. Induction of labor (Correct Answer)
D. Cesarean section

Explanation: ### Explanation **1. Why Induction of Labor is Correct:** The patient presents with **Preeclampsia with severe features** (BP ≥140/90 mmHg with 3+ proteinuria) at **37 weeks gestation**. In cases of preeclampsia, the definitive treatment is delivery once the fetus reaches term (≥37 weeks). Since the pelvis is adequate and there are no contraindications to vaginal delivery (like fetal distress or malpresentation), **Induction of Labor (IOL)** is the management of choice. Even with a low Bishop score (implied by -2 station and 1 cm dilation), cervical ripening agents can be used to initiate labor. **2. Why Other Options are Incorrect:** * **A & B (Observation/Await Spontaneous Labor):** Expectant management is contraindicated at 37 weeks in preeclampsia. Delaying delivery increases the risk of maternal complications (eclampsia, HELLP syndrome, placental abruption) without providing further fetal benefit. * **D (Cesarean Section):** Preeclampsia itself is not an indication for a C-section. A trial of vaginal labor is preferred unless there are obstetric indications (e.g., cephalopelvic disproportion, fetal distress, or failed induction). **3. Clinical Pearls for NEET-PG:** * **Term Preeclampsia:** Always deliver at ≥37 weeks, regardless of severity. * **Pre-term Preeclampsia:** If <34 weeks and stable, manage expectantly with steroids; if ≥34 weeks with severe features, proceed to delivery. * **Magnesium Sulfate ($MgSO_4$):** Should be administered during labor for seizure prophylaxis in severe preeclampsia. * **Antihypertensives:** Indicated only if BP is ≥160/110 mmHg (Severe Hypertension) to prevent maternal stroke. Common choices: Labetalol, Hydralazine, or Nifedipine.

Question 265: Deep transverse arrest is most commonly seen in which type of pelvis?

A. Anthropoid pelvis
B. Android pelvis (Correct Answer)
C. Gynaecoid pelvis
D. Platypelloid pelvis

Explanation: **Explanation:** **Deep Transverse Arrest (DTA)** occurs when the fetal head is arrested in the transverse position at the level of the pelvic outlet or mid-pelvis, failing to undergo internal rotation. **Why Android Pelvis is the correct answer:** The **Android (male-type) pelvis** is characterized by a heart-shaped inlet, convergent side walls, and prominent ischial spines. The most critical feature leading to DTA is the **narrowing of the fore-pelvis** and a **restricted mid-pelvis**. Because the transverse diameter of the outlet is reduced and the subpubic angle is narrow, the fetal head is forced posteriorly. This lack of space prevents the occiput from rotating anteriorly, leading to an arrest in the transverse position. **Analysis of Incorrect Options:** * **Anthropoid Pelvis:** This pelvis has a large anteroposterior diameter. It typically favors an **occipito-posterior (OP)** position or a "face-to-pubes" delivery rather than transverse arrest. * **Gynaecoid Pelvis:** This is the ideal female pelvis. It has a rounded inlet and adequate diameters, which usually allow for normal internal rotation and delivery. * **Platypelloid Pelvis:** This is a "flat" pelvis. While it may cause a **transverse arrest at the inlet** (simple flat pelvis), it is not the classic association for *Deep* Transverse Arrest, which occurs lower in the birth canal. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of DTA:** Android pelvis (followed by Platypelloid). * **Management of DTA:** If the head is engaged and there is no CPD, a **Ventouse (Vacuum)** or **Kielland’s Forceps** (specifically designed for rotation) can be used. Otherwise, a Cesarean section is indicated. * **Android Pelvis features:** Heart-shaped inlet, narrow subpubic angle, and prominent ischial spines (often associated with persistent occipito-posterior positions).

Question 266: Uterine contraction pressure is measured in terms of?

A. mmHg
B. Cm of H2O
C. Montevideo units (Correct Answer)
D. Joules/kg

Explanation: **Explanation:** **Montevideo Units (MVUs)** are the standard clinical measure used to quantify uterine activity during labor. They are calculated by multiplying the **frequency** of contractions (number of contractions in a 10-minute window) by the **average peak amplitude** (intensity) of those contractions, measured in mmHg above the baseline uterine tone. * **Why C is correct:** MVUs provide a comprehensive assessment of "uterine work." In clinical practice, a value of **200–250 MVUs** is generally considered adequate for the progression of the first stage of labor. This measurement requires the use of an **Internal Pressure Transducer (IUPC)** to accurately gauge the intensity. * **Why A & B are incorrect:** While the *intensity* of a single contraction is measured in **mmHg** (or occasionally cm H2O), these units alone do not account for frequency. Therefore, they do not represent the total "uterine contraction pressure" or activity over time. * **Why D is incorrect:** Joules/kg is a unit of energy per mass and has no application in measuring uterine dynamics. **High-Yield Clinical Pearls for NEET-PG:** 1. **Origin:** Named after Caldeyro-Barcia and Alvarez in Montevideo, Uruguay. 2. **Adequacy:** Spontaneous labor usually requires 80–120 MVUs, while augmentation (Oxytocin) often aims for 200–250 MVUs. 3. **Prerequisite:** MVUs can only be calculated via **Internal Tocometry** (IUPC); external tocodynamometry only measures frequency and duration, not true intensity. 4. **Alexandria Units:** A similar but less common unit that also incorporates the *duration* of contractions.

Question 267: Which of the following statements related to rupture uterus is incorrect?

A. A lower segment scar rarely ruptures during pregnancy.
B. In incomplete rupture, the peritoneal coat remains intact.
C. A classical caesarean scar often ruptures during late pregnancy.
D. The risk of lower segment scar rupture is high compared to classical scar rupture. (Correct Answer)

Explanation: **Explanation:** The correct answer is **D** because it is a false statement. In clinical practice, a **classical cesarean scar** (vertical incision in the upper uterine segment) carries a significantly higher risk of rupture (4–9%) compared to a **lower segment cesarean section (LSCS) scar** (0.2–1.5%). This is because the upper segment is more muscular, undergoes active contractions, and heals with more fibrous tissue compared to the relatively passive and thinner lower segment. **Analysis of Options:** * **Option A (Correct statement):** Lower segment scars are relatively stable during pregnancy because the lower segment only thins out and stretches during the late third trimester and active labor. Thus, rupture before the onset of labor is rare. * **Option B (Correct statement):** By definition, an **incomplete rupture** involves the myometrium but leaves the overlying visceral peritoneum (serosa) intact, often forming a subperitoneal hematoma. In **complete rupture**, the products of conception escape into the peritoneal cavity. * **Option C (Correct statement):** Classical scars are notorious for rupturing **before labor** (late pregnancy) because the upper segment is subject to increasing distension as the fetus grows. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of uterine rupture:** Scar dehiscence from a previous LSCS. * **Scar with highest rupture risk:** Classical scar > T-shaped incision > Myomectomy (entering cavity) > LSCS. * **Clinical Presentation:** Sudden cessation of contractions, "recession" of the presenting part (Station becomes higher), and fetal distress (most common sign). * **Management:** Immediate laparotomy and delivery of the fetus, followed by uterine repair or hysterectomy depending on the extent of damage and hemodynamic stability.

Question 268: Hypertonic dysfunctional labor is characterized by which of the following?

A. Fetal distress occurs early (Correct Answer)
B. Reaction to oxytocin is variable
C. Sedation is of little value
D. Occurs more frequently than hypotonic labor

Explanation: **Explanation:** **Hypertonic dysfunctional labor** (also known as colicky uterus or incoordinate uterine action) is characterized by an increase in resting uterine tone (tonus) and frequent, irregular, and painful contractions that are ineffective at dilating the cervix. 1. **Why Option A is correct:** In hypertonic labor, the basal tone of the uterus remains high between contractions. This constant pressure compresses the intramural vessels, significantly reducing placental perfusion and intervillous blood flow. Because the fetus does not receive adequate oxygenation during the "relaxation" phase (which is absent or incomplete), **fetal distress occurs early** in the course of labor. 2. **Why the other options are incorrect:** * **Option B:** The reaction to oxytocin is not variable; it is **contraindicated**. Oxytocin increases uterine tone further, which can lead to uterine rupture or total fetal asphyxia. * **Option C:** **Sedation is the primary treatment.** Morphine or pethidine helps provide rest, relieves pain, and often resets the uterine rhythm, allowing the patient to wake up in normal labor or with the hypertonicity resolved. * **Option D:** It is **less common** than hypotonic labor. Hypotonic dysfunction (weak, infrequent contractions) is the most common type of primary power failure in labor. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Resting tone rises above the normal 10 mmHg (often >20 mmHg). * **Patient Profile:** More common in primigravidae and associated with an "anxious" personality. * **Clinical Sign:** The uterus is tender to touch and does not relax between contractions (unlike hypotonic labor where the uterus is soft). * **Management:** Therapeutic rest (Sedation), hydration, and excluding Cephalopelvic Disproportion (CPD). If distress persists, Cesarean Section is indicated.

Question 269: What is the traction force required for forceps delivery in a primigravida?

A. 15 kgs
B. 18-20 kgs (Correct Answer)
C. 13 kgs
D. 25 kgs

Explanation: **Explanation:** In operative vaginal delivery, the amount of traction force applied via forceps is critical to ensure a successful delivery while minimizing maternal and fetal trauma. The force required is primarily determined by the resistance offered by the birth canal and the perineum. 1. **Why 18-20 kgs is correct:** In a **primigravida**, the soft tissues of the vagina and the rigid perineum offer significant resistance. Clinical studies and obstetric textbooks (such as Dutta’s Textbook of Obstetrics) specify that a traction force of approximately **18-20 kg (40-45 lbs)** is typically required to overcome this resistance and effect delivery. 2. **Why other options are incorrect:** * **13-15 kgs (Options A & C):** These values represent the traction force usually required in **multigravida** patients. Because the pelvic floor tissues have been previously stretched, less force is needed to facilitate the birth. * **25 kgs (Option D):** This force is excessive. Applying traction beyond 20-22 kg significantly increases the risk of intracranial hemorrhage in the fetus and extensive third or fourth-degree perineal tears in the mother. **High-Yield Clinical Pearls for NEET-PG:** * **Direction of Traction:** Traction should be applied in the "axis of the pelvis" (downward and backward initially, then upward as the head crowns). * **The "Trial of Forceps":** If the head does not descend with moderate traction, the procedure should be abandoned in favor of a Cesarean section to avoid "failed forceps" complications. * **Prerequisite:** The cervix must be **fully dilated**, and the membranes must be ruptured before application. * **Forceps vs. Ventouse:** Forceps can exert more traction force than a vacuum extractor (Ventouse), which usually detaches (pops off) if the force exceeds 10-12 kg.

Question 270: Which of the following is NOT a technique for delivering the aftercoming head in a breech presentation?

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

Explanation: In breech presentation, the delivery of the aftercoming head is the most critical stage. The correct answer is **Lobst's maneuver** because it is used for the **delivery of extended arms**, not the head. ### Explanation of Options: * **Lobst’s Maneuver (Correct Answer):** This technique involves rotating the fetus 180 degrees while maintaining downward traction to bring the posterior arm to the anterior position, allowing for the delivery of extended arms. Since it addresses the shoulders/arms, it is not a technique for the head. * **Burns-Marshall Method:** A classic technique where the baby is allowed to hang by its own weight to encourage flexion. Once the nape of the neck is visible, the feet are grasped and swept in a wide arc over the mother’s abdomen to deliver the head. * **Modified Mauriceau-Smellie-Viet (MSV) Technique:** Considered the most common manual method. It uses malar flexion (fingers on the cheekbones) and fetal body support on the clinician's forearm to maintain flexion of the head during delivery. * **Forceps Delivery:** **Piper’s forceps** are specifically designed for the aftercoming head. They have a long perineal curve to reach the head while the body is held aloft. ### High-Yield Clinical Pearls for NEET-PG: * **Prerequisite for Head Delivery:** The most important factor is maintaining **flexion** of the fetal head. * **Wigand-Martin-Winckel Maneuver:** Another method for the head where one hand is in the vagina (on the jaw) and the other hand applies suprapubic pressure. * **Pinard’s Maneuver:** Used for bringing down the legs in a frank breech. * **Løvset Maneuver:** Often confused with Lobst; Løvset involves rotation and traction to deliver the shoulders.

Practice by Chapter

Physiology of Labor

Practice Questions

Stages of Labor and Normal Progression

Practice Questions

Fetal Monitoring Techniques

Practice Questions

Pain Management in Labor

Practice Questions

Induction and Augmentation of Labor

Practice Questions

Operative Delivery (Forceps and Vacuum)

Practice Questions

Cesarean Section: Indications and Techniques

Practice Questions

Dystocia and Abnormal Labor Patterns

Practice Questions

Obstetric Emergencies

Practice Questions

Postpartum Hemorrhage Management

Practice Questions

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