Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 611: All of the following are complications of shoulder presentation except:

A. Fetal death
B. Uterine rupture
C. Obstructed labor
D. Shoulder dystocia (Correct Answer)

Explanation: **Explanation:** The correct answer is **Shoulder Dystocia**. This is a common point of confusion in NEET-PG; however, the distinction lies in the **fetal lie**. 1. **Why Shoulder Dystocia is the correct answer:** Shoulder dystocia is a complication of a **longitudinal lie** (cephalic presentation). It occurs when the fetal head is delivered, but the anterior shoulder becomes impacted behind the maternal symphysis pubis. In contrast, a **shoulder presentation** occurs in a **transverse lie**, where the long axis of the fetus is perpendicular to the mother. Since the fetus is transverse, the head never enters the birth canal first, making "shoulder dystocia" (as defined) anatomically impossible. 2. **Why other options are incorrect:** * **Obstructed Labor:** In a transverse lie, the fetus cannot pass through the pelvic brim. If left uncorrected, the shoulder is wedged into the pelvis, leading to "neglected shoulder presentation" and total obstruction. * **Uterine Rupture:** Persistent obstructed labor from a transverse lie leads to the formation of a pathological retraction ring (Bandl’s ring). The lower uterine segment becomes dangerously thin and eventually ruptures. * **Fetal Death:** This is a frequent outcome of neglected shoulder presentation due to cord prolapse (common in transverse lie), placental abruption, or prolonged labor leading to asphyxia. **Clinical Pearls for NEET-PG:** * **Management:** The treatment of choice for a transverse lie in labor at term is **Cesarean Section**. * **Hand Prolapse:** If a hand prolapses in shoulder presentation, determine the "handshake" to identify fetal position (Right hand = Right Acromio-Dorso-Posterior/Anterior). * **Key Risk:** Cord prolapse occurs in nearly 10-15% of transverse lies because the presenting part does not effectively fill the lower uterine segment.

Question 612: Which of the following is NOT included in the modified Bishop score?

A. Cervical dilation
B. Length of cervix
C. Station of the head
D. Colour of the amniotic fluid (Correct Answer)

Explanation: The **Bishop Score** is a pre-labor scoring system used to predict the likelihood of a successful vaginal delivery following the induction of labor. A score of 8 or more suggests a "ripe" cervix with a high probability of success, while a score of 6 or less indicates an "unripe" cervix requiring cervical ripening agents (like Dinoprostone). ### Why "Colour of the amniotic fluid" is the correct answer: The Bishop score evaluates the physical characteristics of the **cervix** and the **fetal position** relative to the maternal pelvis. The **colour of the amniotic fluid** (e.g., meconium-stained or clear) is an assessment of fetal well-being and the presence of potential distress, but it plays no role in determining the "readiness" of the cervix for labor induction. ### Why the other options are incorrect: The modified Bishop score consists of five parameters, all of which are represented in options A, B, and C: * **Cervical Dilation (A):** Measured in centimeters (0 to >5 cm). * **Length of Cervix (B):** Also referred to as **Effacement**. In the original score, it is measured as a percentage, while in the modified version, it is often measured in centimeters (0–4 cm). * **Station of the head (C):** The position of the fetal presenting part relative to the maternal ischial spines (-3 to +2). * **Consistency of cervix:** (Firm, medium, or soft). * **Position of cervix:** (Posterior, mid-position, or anterior). ### High-Yield Clinical Pearls for NEET-PG: * **Mnemonic to remember parameters:** **"S**tation, **D**ilation, **E**ffacement, **P**osition, **C**onsistency" (**SDEPC**). * **Modified vs. Original:** The primary difference in the *Modified* Bishop score is the use of cervical length (in cm) instead of percentage effacement. * **Cut-off:** A score **≥8** is favorable for induction (success rate comparable to spontaneous labor); **≤6** is unfavorable. * **Most important parameter:** Cervical **dilation** is considered the most significant predictor of successful induction.

Question 613: Vaginal delivery is contraindicated in:

A. Central placenta previa (Correct Answer)
B. Previous lower segment caesarean section
C. Eclampsia
D. Antepartum hemorrhage

Explanation: **Explanation:** **Central Placenta Previa (Type IV)** is an absolute contraindication to vaginal delivery. In this condition, the placenta completely covers the internal os of the cervix. As the cervix dilates during labor, the placental attachments are inevitably torn, leading to sudden, massive, and life-threatening maternal hemorrhage and fetal distress. Therefore, an elective Cesarean Section is mandatory. **Analysis of Incorrect Options:** * **Previous Lower Segment Caesarean Section (LSCS):** This is not an absolute contraindication. Many women are candidates for **VBAC** (Vaginal Birth After Cesarean) or **TOLAC** (Trial of Labor After Cesarean), provided the previous incision was lower transverse and there are no recurring indications for surgery. * **Eclampsia:** The definitive treatment is delivery, but the mode depends on the obstetric status. If the cervix is favorable and labor is progressing, vaginal delivery is often preferred over surgery to avoid the hemodynamic stress of anesthesia and surgery, provided the seizures are controlled with Magnesium Sulfate. * **Antepartum Hemorrhage (APH):** APH is a broad term including Placenta Previa and Abruptio Placentae. While some types require CS, others (like mild Abruptio or Low-lying placenta) may allow for vaginal delivery under strict monitoring. **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Contraindications to Vaginal Delivery:** Central placenta previa, vasa previa, cord prolapse (with live fetus), transverse lie, and active primary genital herpes. * **Placenta Previa Grading:** Type I and II (Anterior) may attempt vaginal delivery; Type II (Posterior/Dangerous Type), III, and IV require CS. * **Stallworthy’s Sign:** A dip in fetal heart rate when the head is pressed into the pelvis, seen in posterior placenta previa.

Question 614: Which of the following is TRUE about a terminal cardiotocogram?

A. Baseline oscillation of less than 5 bpm
B. Absent accelerations
C. Late decelerations with spontaneous uterine contractions
D. All of the above (Correct Answer)

Explanation: **Explanation:** A **Terminal Cardiotocogram (CTG)** represents a pre-terminal fetal state, indicating severe fetal hypoxia and acidosis. It is a sign of impending fetal demise and requires immediate obstetric intervention (usually emergency Cesarean section). **Why "All of the Above" is Correct:** A terminal CTG is characterized by a combination of features that reflect the failure of the fetal autonomic nervous system and myocardium: 1. **Reduced/Absent Variability (Option A):** A baseline oscillation of **less than 5 bpm** (silent pattern) indicates that the fetal brain is no longer able to regulate the heart rate due to severe acidemia or hypoxia. 2. **Absent Accelerations (Option B):** Accelerations are a sign of fetal wellbeing. Their absence, especially when combined with other abnormal features, signifies a non-reactive and compromised fetus. 3. **Late Decelerations (Option C):** These occur due to uteroplacental insufficiency. In a terminal state, even **spontaneous uterine contractions** (which are less intense than induced ones) are enough to trigger late decelerations because the fetus has zero respiratory reserve. **Clinical Pearls for NEET-PG:** * **Definition of Normal Variability:** 5–25 bpm. * **Sinusoidal Pattern:** A specific high-yield CTG finding associated with severe fetal anemia (e.g., Rh isoimmunization) or acute fetal hemorrhage. * **Rule of 3s for Bradycardia:** 3 minutes (Abnormal), 6 minutes (Move to OT), 9 minutes (Deliver by 10th minute). * **Reassuring CTG:** Baseline 110–160 bpm, variability >5 bpm, and presence of accelerations. **Summary:** A terminal CTG is the "final warning" before intrauterine death. It is defined by a flat baseline (silent pattern), absence of reactivity, and repetitive late decelerations, making all the provided options correct.

Question 615: What is considered a dangerously low-lying placenta?

A. Type I anterior placenta
B. Type II anterior placenta
C. Type I posterior placenta
D. Type II posterior placenta (Correct Answer)

Explanation: **Explanation:** The term **"dangerously low-lying placenta"** specifically refers to a **Type II posterior placenta previa**. This classification is critical in obstetrics due to the anatomical relationship between the placenta and the pelvic brim. **1. Why Type II Posterior is the Correct Answer:** In a posterior placenta, the placental tissue lies over the sacral promontory. As the fetal head descends into the pelvis during labor, it can compress the placenta against the hard sacral bone. This compression leads to two major complications: * **Fetal Distress:** Compression of placental vessels reduces oxygen supply to the fetus. * **Mechanical Obstruction:** The bulk of the placenta reduces the effective anteroposterior (AP) diameter of the pelvic inlet (the "Stallworthy’s sign"), preventing the fetal head from engaging and often leading to malpresentation or obstructed labor. **2. Analysis of Incorrect Options:** * **Type I (Anterior/Posterior):** These are "low-lying" placentas where the edge does not reach the internal os. They rarely cause significant mechanical obstruction or severe compression during engagement. * **Type II Anterior:** While the placenta is near the internal os, the anterior segment of the lower uterus is more distensible. The fetal head can usually bypass or push the placenta against the soft bladder/symphysis pubis without the same degree of vascular compression or inlet narrowing seen in posterior cases. **3. High-Yield Clinical Pearls for NEET-PG:** * **Stallworthy’s Sign:** A drop in the fetal heart rate when the head is pushed into the pelvis, which recovers when pressure is released; classic for posterior placenta previa. * **Placental Migration:** The phenomenon where the placenta appears to move upward as the lower uterine segment develops; a diagnosis of previa should not be finalized before 28 weeks. * **Management:** Type II posterior is often considered an indication for Cesarean Section because of the high risk of fetal hypoxia and obstructed labor.

Question 616: Which of the following complications during pregnancy does NOT increase the risk of postpartum hemorrhage (PPH)?

A. Hypertension (Correct Answer)
B. Macrosomia
C. Twin pregnancy
D. Hydramnios

Explanation: **Explanation:** Postpartum Hemorrhage (PPH) is primarily caused by the "4 Ts": **Tone** (Atony), **Tissue** (Retained products), **Trauma**, and **Thrombin** (Coagulopathy). Uterine atony is the most common cause (80%). **Why Hypertension is the Correct Answer:** Hypertension (including Preeclampsia) is generally associated with **vasoconstriction** and, in some cases, a hypercoagulable state. While severe preeclampsia can lead to HELLP syndrome (causing coagulopathy), hypertension itself does not cause uterine atony. In fact, some studies suggest that hypertensive disorders may slightly increase uterine tone. Therefore, among the given options, it is the least likely to be a direct risk factor for atonic PPH. **Why the other options are incorrect:** * **B. Macrosomia:** A large fetus causes **overdistension** of the myometrium. An overstretched uterus has poor contractile ability after delivery, leading to atony. * **C. Twin Pregnancy:** Similar to macrosomia, multiple gestations cause significant uterine overdistension, which is a classic risk factor for atonic PPH. * **D. Hydramnios:** Excessive amniotic fluid leads to rapid decompression and overdistension of the uterus, preventing effective contraction of the "living ligatures" (myometrial fibers) after placental expulsion. **Clinical Pearls for NEET-PG:** * **Most common cause of PPH:** Uterine Atony. * **Most common risk factor for PPH:** Overdistension of the uterus (Twins, Polyhydramnios, Macrosomia). * **Management Tip:** Active Management of Third Stage of Labor (AMTSL) reduces the risk of PPH by 60%. * **Drug Contraindication:** Ergometrine is strictly **contraindicated** in hypertensive patients as it can cause a sudden rise in blood pressure or encephalopathy.

Question 617: A full-term primipara presents with antepartum hemorrhage. What is the next line of management?

A. Pelvic examination
B. Conservative management until the onset of labor
C. Lower segment cesarean section
D. Examination in the operating room followed by amniotomy (Correct Answer)

Explanation: ### **Explanation** The clinical scenario describes a full-term primipara with **Antepartum Hemorrhage (APH)**, likely due to placenta previa or abruptio placentae. At term, the primary goal is delivery. **Why Option D is Correct:** The standard protocol for managing APH at term, where the diagnosis of placenta previa is not definitively ruled out, is the **Double Set-up Examination**. This involves performing a vaginal examination in the **Operating Room** with the surgical team ready for an immediate Cesarean Section if heavy bleeding occurs. If the examination reveals a low-lying placenta (Type I or Type II anterior) or if it is a case of placental abruption, an **amniotomy (Artificial Rupture of Membranes)** is performed to induce/accelerate labor and provide tamponade to the bleeding vessels. **Why Other Options are Incorrect:** * **A. Pelvic examination:** A routine pelvic examination in the emergency room or ward is **strictly contraindicated** in APH. If placenta previa is present, digital palpation can cause massive, life-threatening hemorrhage. * **B. Conservative management:** This is part of the *Macafee and Johnson protocol*, but it is only indicated if the fetus is **preterm (<37 weeks)** and there is no active bleeding or fetal distress. At term, delivery is the management of choice. * **C. Lower segment cesarean section:** While LSCS is the definitive management for major degrees of placenta previa (Type II posterior, III, and IV), it is not the immediate "next step" for every case of APH until the degree of previa is assessed or if vaginal delivery is feasible via amniotomy. ### **High-Yield Clinical Pearls for NEET-PG** * **Macafee & Johnson Protocol:** Aimed at reaching 37 weeks of gestation (Conservative management). * **Stallworthy’s Sign:** A drop in fetal heart rate when the head is pressed into the pelvis, suggestive of a **posterior placenta previa**. * **Investigation of Choice:** Transvaginal Ultrasound (TVS) is the gold standard for diagnosing the location of the placenta, as it is safer and more accurate than transabdominal scans. * **Amniotomy's Role:** It reduces intra-amniotic pressure, which helps in controlling bleeding in placental abruption and facilitates labor.

Question 618: A Bishop score of more than ----- indicates that labor has begun?

A. 3
B. 5
C. 6 (Correct Answer)
D. 7

Explanation: ### Explanation The **Bishop score** (also known as the pelvic score) is a pre-induction scoring system used to assess the "ripeness" of the cervix and predict the likelihood of a successful vaginal delivery. **Why 6 is the correct answer:** A Bishop score of **6 or more** is clinically significant because it indicates a "favorable" cervix. In the context of labor, a score of $\geq 6$ suggests that the cervix is sufficiently ripe and that spontaneous labor has likely begun or that the induction of labor is highly likely to result in a successful vaginal delivery. Conversely, a score of $\leq 5$ is considered "unfavorable," often requiring cervical ripening agents (like Prostaglandins) before induction. **Analysis of Incorrect Options:** * **A (3) & B (5):** These scores represent an "unfavorable" or "unripe" cervix. If induction is attempted at these scores, there is a high risk of failure and a higher likelihood of requiring a Cesarean section. * **D (7):** While a score of 7 is indeed favorable, the standard clinical threshold for defining a ripe cervix/onset of labor in most standardized textbooks (like Williams Obstetrics) and NEET-PG patterns is **6**. **High-Yield Clinical Pearls for NEET-PG:** * **Components of Bishop Score:** Remember the mnemonic **"STATION"** or **"3S + 2C"**: **S**tation, **S**oftness (Consistency), **S**pacing (Effacement), **C**ervical Position, and **C**ervical Dilation. * **Maximum Score:** 13. * **Most Important Parameter:** Cervical **Dilation** is considered the most reliable single predictor of a successful induction. * **Modified Bishop Score:** Often replaces "effacement" with "cervical length" (in cm) for more objective measurement.

Question 619: What is the single most effective drug in eclampsia?

A. Dilantin
B. Phenobarbital
C. Magnesium sulphate (Correct Answer)
D. Paraldehyde

Explanation: **Explanation:** **Magnesium sulphate ($MgSO_4$)** is the drug of choice for both the prevention and control of seizures in eclampsia. Its superiority was definitively established by the **Collaborative Eclampsia Trial**, which proved it is more effective than phenytoin or diazepam in preventing recurrent convulsions and reducing maternal mortality. **Mechanism of Action:** $MgSO_4$ acts as a central nervous system depressant and a vasodilator. It works primarily by blocking **NMDA receptors** in the brain, increasing the seizure threshold. It also causes cerebral vasodilation, which reverses the vasospasm associated with eclampsia. **Why other options are incorrect:** * **Dilantin (Phenytoin):** While an effective anti-epileptic for primary seizure disorders, it is significantly less effective than $MgSO_4$ in eclampsia and carries a higher risk of recurrent seizures. * **Phenobarbital:** This is a sedative-hypnotic. It causes significant maternal respiratory depression and neonatal depression (floppy baby syndrome) without addressing the underlying pathophysiology of eclampsia. * **Paraldehyde:** Now largely obsolete, it was used historically but is difficult to administer and lacks the specific neuroprotective benefits of Magnesium. **High-Yield Clinical Pearls for NEET-PG:** * **Regimen:** The **Pritchard Regimen** (IM) and **Zuspan Regimen** (IV) are the standard protocols. * **Therapeutic Range:** 4–7 mEq/L. * **Monitoring:** Always check for **Patellar reflex** (first to disappear), **Respiratory rate** (>12/min), and **Urine output** (>30 ml/hr) before each dose. * **Antidote:** 10 ml of 10% **Calcium Gluconate** IV (administered slowly).

Question 620: What is the recommended management for intrauterine fetal death at 36 weeks gestation?

A. Continue pregnancy until term
B. Await spontaneous expulsion (Correct Answer)
C. Administer Syntocinon and artificial rupture of membranes (ARM)
D. Perform hysterectomy

Explanation: **Explanation:** The management of **Intrauterine Fetal Death (IUFD)** involves balancing psychological distress with maternal safety. In clinical practice, approximately **80% of women will go into spontaneous labor within two weeks** of fetal demise. **Why Option B is correct:** Awaiting spontaneous expulsion is the traditional recommended approach because it avoids the risks associated with induction of labor (IOL) and surgical intervention. While modern obstetrics often offers induction for psychological reasons, "awaiting spontaneous labor" remains a standard conservative management option in textbook protocols, especially to minimize maternal morbidity. **Why other options are incorrect:** * **Option A:** Continuing pregnancy until term is not recommended due to the risk of **Disseminated Intravascular Coagulation (DIC)**. After 4 weeks of fetal retention, thromboplastin from the dead fetus enters maternal circulation, depleting fibrinogen levels. * **Option C:** While IOL is common, **Syntocinon (Oxytocin) and ARM** are generally ineffective if the cervix is unfavorable (unripe). Prostaglandins (like Misoprostol) are the preferred agents for induction in IUFD. * **Option D:** Hysterectomy is an extreme surgical procedure and is never indicated for IUFD unless there are life-threatening complications like uncontrollable postpartum hemorrhage or a ruptured uterus. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** The "Gold Standard" is the absence of fetal heart activity on **Real-time Ultrasound**. * **Radiological Signs (Historical):** **Spalding sign** (overlapping of skull bones), **Robert’s sign** (gas in fetal large vessels), and **Deuel’s halo sign** (scalp edema). * **Coagulation Profile:** If managed conservatively, weekly monitoring of maternal fibrinogen levels is mandatory to screen for impending DIC. * **Preferred Induction Agent:** **Misoprostol** (PGE1) is highly effective for labor induction in IUFD, regardless of gestational age.

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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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