Labor and Delivery — MCQs

A G2P1 patient presents at 34 weeks of pregnancy in labor with cervical dilatation of 3 cm and minimal uterine contractions. After artificial rupture of membranes, fresh bleeding is observed along with late decelerations. An emergency cesarean section was performed, but the fetus could not be saved. No abruption or placenta previa was noted. What is the most likely diagnosis?

Q576Easy

When should IV Ergotamine be administered?

Q577Easy

Which cardinal movements occur during labor?

Q578Medium

What complication is associated with a paracervical block?

Q579Easy

What is the most common type of pelvis associated with a direct occipitoposterior position during labor?

Q580Medium

Which of the following statements accurately describes the instrumental delivery system?

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 571: A pregnant woman at 38 weeks gestation presents with painless vaginal bleeding. On examination, the head is engaged and the uterus is non-tender and relaxed. What is the next line of treatment?

A. Per speculum examination
B. Conservative management
C. Termination of pregnancy (Correct Answer)
D. Ultrasonography

Explanation: ### Explanation **1. Why "Termination of Pregnancy" is Correct:** The clinical presentation of **painless vaginal bleeding** in the third trimester, a **relaxed/non-tender uterus**, and an **engaged head** strongly suggests **Placenta Previa** (specifically low-lying or marginal, as the head is engaged). In cases of Antepartum Hemorrhage (APH), the management depends on the period of gestation and the severity of bleeding. Since the patient is at **38 weeks (term)**, the fetus is mature. Regardless of the type of placenta previa or the severity of bleeding, **expectant management (MacAfee regimen) is never continued beyond 37 weeks.** Once the pregnancy reaches term, the definitive treatment is delivery (termination of pregnancy) to prevent further life-threatening hemorrhage. **2. Why Other Options are Incorrect:** * **A. Per Speculum Examination:** While a speculum exam is done to rule out local causes (like cervical polyps), it is only performed *after* confirming the placental site via USG. A digital or rough speculum exam in placenta previa can provoke torrential hemorrhage. * **B. Conservative Management:** This is the MacAfee & Johnson regimen, indicated only if the fetus is **preterm (<37 weeks)**, bleeding is not life-threatening, and the mother is hemodynamically stable. At 38 weeks, it is contraindicated. * **D. Ultrasonography:** While USG is the "Gold Standard" for diagnosing the location of the placenta, the question asks for the **"next line of treatment"** for a term pregnancy. Diagnosis is secondary to the management decision of delivery at 38 weeks. **3. Clinical Pearls for NEET-PG:** * **Double Setup Examination:** Vaginal examination in suspected placenta previa should only be done in the OT under anesthesia with preparations for an immediate C-section. * **Stallworthy’s Sign:** A drop in fetal heart rate when the head is pressed into the pelvis, seen in posterior placenta previa. * **Rule of Thumb:** If APH occurs at $\geq$ 37 weeks $\rightarrow$ **Deliver.** If < 37 weeks and stable $\rightarrow$ **Conserve.**

Question 572: All of the following are causes of Disseminated Intravascular Coagulation (DIC), except?

A. Intrauterine death
B. Missed abortion
C. Abruptio placentae
D. Multiple pregnancy (Correct Answer)

Explanation: **Explanation:** Disseminated Intravascular Coagulation (DIC) in obstetrics is a secondary pathological process triggered by the entry of procoagulant substances (like thromboplastin) into the maternal circulation, leading to widespread activation of the clotting cascade and subsequent consumption of clotting factors. **Why Multiple Pregnancy is the correct answer:** Multiple pregnancy, by itself, is a physiological state and not a trigger for DIC. While it increases the risk for complications like Postpartum Hemorrhage (PPH) or Pre-eclampsia, it does not involve the release of thromboplastin into the circulation unless one of those secondary complications occurs. **Why the other options are causes of DIC:** * **Abruptio Placentae:** This is the **most common cause** of DIC in pregnancy. Retroplacental clots release massive amounts of tissue thromboplastin into the maternal venous sinuses. * **Intrauterine Death (IUD) & Missed Abortion:** If a dead fetus is retained for more than 3–4 weeks, the autolysis of fetal tissues and the placenta releases thromboplastin into the maternal circulation, leading to "Dead Fetus Syndrome" and consumption coagulopathy. **NEET-PG High-Yield Pearls:** 1. **Most common cause of DIC in pregnancy:** Abruptio Placentae. 2. **Most common cause of DIC in clinical practice (overall):** Sepsis. 3. **Amniotic Fluid Embolism:** A rare but catastrophic cause of sudden, severe DIC due to the high concentration of procoagulants in amniotic fluid. 4. **Diagnosis:** Look for decreased Fibrinogen (<150 mg/dL), increased D-dimer/FDPs, and prolonged PT/APTT. 5. **Management:** The definitive treatment is the delivery of the fetus and placenta to remove the source of thromboplastin. Blood products (FFP, Cryoprecipitate, Platelets) are used for stabilization.

Question 573: Which of the following is the most favorable breech presentation?

A. Extended breech (Correct Answer)
B. Complete breech
C. Footling breech
D. Extended head breech

Explanation: **Explanation:** In breech presentation, the **Extended Breech (Frank Breech)** is considered the most favorable for a vaginal delivery. In this position, the thighs are flexed at the hips and the legs are extended at the knees (feet near the face). **Why Extended Breech is the most favorable:** The primary reason is the **"wedge effect."** The buttocks and the extended legs together form a continuous, broad, and firm conical mass that effectively dilates the cervix. This ensures that the cervix is sufficiently dilated to allow the passage of the after-coming head, significantly reducing the risk of **cord prolapse** (0.5% risk) compared to other breech types. **Analysis of Incorrect Options:** * **Complete Breech:** Both hips and knees are flexed (sitting cross-legged). While more favorable than footling, the irregular shape is less efficient at dilating the cervix than the frank breech, and the risk of cord prolapse is higher (4–5%). * **Footling Breech:** One or both feet are the presenting part. This is the **least favorable** and most dangerous because the narrow feet cannot dilate the cervix adequately, and there is a high risk of cord prolapse (15–20%). * **Extended Head Breech:** This refers to a "stargazing fetus" where the fetal head is hyperextended. This is a **contraindication** for vaginal delivery as it can lead to cervical spine injury or obstructed labor. **High-Yield Clinical Pearls for NEET-PG:** * **Most common type:** Frank breech is the most common variety (60–70%), especially in primigravidae. * **Cord Prolapse Risk:** Footling (Highest) > Complete > Frank (Lowest). * **Prerequisite for Vaginal Breech Delivery:** The fetal head must be flexed, and the estimated fetal weight should ideally be between 2.5 kg and 3.5 kg.

Question 574: Vaginal delivery is contraindicated in which of the following conditions?

A. Previous classical Cesarean section (Correct Answer)
B. Preterm labor
C. Previous lower segment Cesarean section
D. Face presentation

Explanation: **Explanation:** The correct answer is **A. Previous classical Cesarean section.** **1. Why Option A is Correct:** A classical Cesarean section involves a vertical incision in the upper segment of the uterus (the active contractile portion). This area does not heal as strongly as the lower segment and is subject to intense stretching and contraction during labor. The risk of **uterine rupture** during a subsequent pregnancy or labor is significantly high (approximately 4–9%) and often occurs *before* the onset of labor. Therefore, a trial of labor after a classical section is strictly contraindicated, and an elective repeat Cesarean section is mandatory. **2. Why the Other Options are Incorrect:** * **B. Preterm labor:** Vaginal delivery is the preferred route for preterm labor unless there are specific obstetric indications (like malpresentation or fetal distress). * **C. Previous lower segment Cesarean section (LSCS):** Patients with one previous LSCS are candidates for a **Trial of Labor After Cesarean (TOLAC)**, provided there are no other contraindications. The risk of rupture is much lower (~0.5–1%) compared to a classical incision. * **D. Face presentation:** Vaginal delivery is possible in face presentation provided the position is **Mentum Anterior**. Only Mentum Posterior positions require a Cesarean section because the head cannot extend further to negotiate the birth canal. **Clinical Pearls for NEET-PG:** * **Absolute Contraindications to VBAC:** Previous classical or T-shaped incision, previous uterine rupture, extensive transfundal uterine surgery (e.g., deep intramural myomectomy), and any contraindication to vaginal birth (e.g., placenta previa). * **Ideal Candidate for TOLAC:** One previous LSCS, non-recurring indication (e.g., breech), and a clinically pelvimetrically adequate pelvis. * **Rupture Risk:** Classical (4–9%) > T-shaped (4–9%) > Vertical lower segment (1–7%) > LSCS (0.5–1%).

Question 575: A G2P1 patient presents at 34 weeks of pregnancy in labor with cervical dilatation of 3 cm and minimal uterine contractions. After artificial rupture of membranes, fresh bleeding is observed along with late decelerations. An emergency cesarean section was performed, but the fetus could not be saved. No abruption or placenta previa was noted. What is the most likely diagnosis?

A. Concealed abruptio placentae
B. Battledore placenta
C. Vasa previa (Correct Answer)
D. Placenta accreta

Explanation: **Explanation:** The clinical presentation of **Vasa Previa** is classic: painless vaginal bleeding (fetal blood) occurring immediately after the **rupture of membranes (ROM)**, followed by rapid fetal distress (late decelerations or bradycardia) and fetal demise. In vasa previa, fetal vessels run unprotected by Wharton’s jelly across the internal os. When the membranes rupture, these vessels tear, leading to rapid fetal exsanguination since the total fetal blood volume is very small (~80-100 mL/kg). **Why other options are incorrect:** * **Concealed Abruptio Placentae:** While it causes fetal distress, it is usually associated with severe abdominal pain, a "woody hard" uterus, and the absence of fresh vaginal bleeding. The question specifically ruled out abruption during the C-section. * **Battledore Placenta:** This refers to the insertion of the umbilical cord at the placental margin. While it can lead to vasa previa if vessels traverse the membranes, the term itself describes a placental morphology that does not inherently cause bleeding unless vessels are ruptured. * **Placenta Accreta:** This is a disorder of placental adhesion to the myometrium. It typically presents with a failure of placental separation and massive postpartum hemorrhage, not fetal bleeding during labor. **Clinical Pearls for NEET-PG:** * **Triad of Vasa Previa:** Rupture of membranes + Painless vaginal bleeding + Fetal distress (bradycardia/sinusoidal pattern). * **Apt Test / Kleihauer-Betke Test:** Used to differentiate fetal blood from maternal blood in vaginal discharge. * **Risk Factors:** Velamentous cord insertion, succenturiate placental lobes, and IVF pregnancies. * **Management:** If diagnosed prenatally via Doppler USG, elective C-section is planned at 34–35 weeks. If diagnosed during labor, immediate emergency C-section is mandatory.

Question 576: When should IV Ergotamine be administered?

A. After the delivery of the shoulder (Correct Answer)
B. During breech extraction
C. In twin pregnancy, after the first child is delivered
D. During face presentation

Explanation: **Explanation:** The administration of **IV Ergotamine (or Ergometrine)** is a critical step in the active management of the third stage of labor (AMTSL). **Why Option A is Correct:** Ergotamine is a potent uterotonic that causes **tetanic (sustained) uterine contractions**. It is administered after the delivery of the anterior shoulder to ensure the uterus contracts immediately after the fetus is expelled. This rapid contraction compresses the intramyometrial blood vessels (the "living ligatures"), effectively preventing Primary Postpartum Hemorrhage (PPH). If given earlier, it risks trapping the fetus; if given later, it may trap a detached placenta. **Why Other Options are Incorrect:** * **B. Breech Extraction:** Administering ergotamine before the head is delivered can cause the cervix to spasm or the uterus to contract violently, leading to **head entrapment**, fetal hypoxia, or intracranial hemorrhage. * **C. Twin Pregnancy (after first child):** Ergotamine is strictly contraindicated until the **last** fetus is delivered. Giving it after the first twin would cause uterine hypertonicity, leading to fetal distress or placental abruption for the second twin. * **D. Face Presentation:** Like any malpresentation, the priority is safe delivery of the fetus. Uterotonics should never be given while the fetus is still in the birth canal (except at the shoulder) as it can cause **uterine rupture**. **High-Yield NEET-PG Pearls:** * **Drug of Choice for PPH Prophylaxis:** Oxytocin (10 IU IM) is now preferred over Ergometrine due to fewer side effects. * **Contraindications for Ergotamine:** Hypertension (Preeclampsia/Eclampsia), Heart Disease (causes sudden increase in venous return), and Rh-negative mothers (may cause feto-maternal micro-transfusion). * **Side Effects:** Nausea, vomiting, and transient hypertension.

Question 577: Which cardinal movements occur during labor?

A. Flexion
B. Extension
C. Internal rotation and Descent both
D. All of the above (Correct Answer)

Explanation: The cardinal movements of labor, also known as the **mechanisms of labor**, refer to the series of positional changes the fetal head undergoes to navigate the maternal bony pelvis. **Explanation of the Correct Answer:** The correct answer is **D (All of the above)** because labor is a continuous process involving several distinct but overlapping movements. The standard sequence includes: 1. **Engagement:** The biparietal diameter passes the pelvic inlet. 2. **Descent:** The continuous downward movement (the prerequisite for all other movements). 3. **Flexion:** The chin is brought into contact with the fetal thorax, changing the presenting diameter to the smaller suboccipitobregmatic (9.5 cm). 4. **Internal Rotation:** The occiput rotates (usually anteriorly) to align with the AP diameter of the pelvic outlet. 5. **Extension:** The head is delivered as the occiput passes under the symphysis pubis. 6. **Restitution & External Rotation:** The head aligns with the shoulders. 7. **Expulsion:** Delivery of the body. **Why other options are incorrect:** Options A, B, and C are individual components of the mechanism of labor. While each is a cardinal movement, selecting any one individually would be incomplete. In NEET-PG, when multiple correct physiological steps are listed, "All of the above" is the most comprehensive choice. **High-Yield Clinical Pearls for NEET-PG:** * **Descent** is the only movement that occurs throughout the entire process of labor. * **Internal rotation** occurs at the level of the pelvic floor (levator ani muscles). * The **suboccipitobregmatic diameter** (9.5 cm) is the smallest presenting diameter in a well-flexed head. * **Restitution** is the visible external movement of the head that corrects the 45-degree twist created during internal rotation.

Question 578: What complication is associated with a paracervical block?

A. Inhibition of labor
B. Fetal bradycardia (Correct Answer)
C. Increased loss of blood
D. Atonicity of uterus

Explanation: **Explanation:** **Paracervical block** is a regional anesthesia technique used during the first stage of labor to provide relief from cervical dilation and uterine contractions. It involves injecting a local anesthetic (like lidocaine) into the fornices of the vagina at the 3 and 9 o'clock positions. **Why Fetal Bradycardia is the correct answer:** The most significant and characteristic complication of a paracervical block is **fetal bradycardia**, occurring in approximately 10–15% of cases. This typically develops 2 to 10 minutes after injection. The underlying mechanism is believed to be **uterine artery vasoconstriction** or direct toxicity due to the proximity of the anesthetic to the uterine arteries, leading to decreased placental perfusion and fetal hypoxia. **Analysis of Incorrect Options:** * **A. Inhibition of labor:** Paracervical blocks do not typically inhibit uterine contractions or prolong the first stage of labor; they only block sensory nerve transmission. * **C. Increased loss of blood:** This is not a direct complication of the block itself, although accidental intravascular injection can cause systemic maternal toxicity. * **D. Atonicity of uterus:** The block affects the nerve supply (Frankenhauser’s plexus) but does not interfere with the myometrium's ability to contract postpartum. **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** Only for the **first stage** of labor (pain from cervical dilation). It does not provide anesthesia for the second stage (perineal pain). * **Contraindication:** It should be avoided in cases of **uteroplacental insufficiency** or a non-reassuring fetal heart rate, as it can exacerbate fetal distress. * **Alternative:** For the second stage of labor, a **Pudendal block** is preferred to provide anesthesia for episiotomy and forceps delivery.

Question 579: What is the most common type of pelvis associated with a direct occipitoposterior position during labor?

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

Explanation: **Explanation:** The **Anthropoid pelvis** is characterized by an anteroposterior (AP) diameter that is longer than the transverse diameter (oval-shaped inlet). Due to the narrow transverse diameter and a spacious posterior segment, the fetal head often engages in the AP diameter. This anatomical configuration favors the **Direct Occipitoposterior (OP)** or Occito-anterior position, as there is more room for the head to fit in the long AP axis rather than rotating transversely. **Analysis of Options:** * **Gynaecoid (A):** The "normal" female pelvis with a round inlet. It typically favors transverse engagement followed by rotation to **Occipito-anterior (OA)**. * **Platypelloid (B):** A "flat" pelvis with a short AP and wide transverse diameter. It strongly favors **persistent transverse position** (Deep Transverse Arrest) because the head cannot rotate into the narrow AP diameter. * **Android (D):** A "heart-shaped" or masculine pelvis. It is frequently associated with **transverse or oblique** engagement and is the most common pelvis associated with **Persistent Occipitoposterior** (where the head fails to rotate), often leading to obstructed labor. **NEET-PG High-Yield Pearls:** * **Most common pelvis:** Gynaecoid (50%). * **Least common pelvis:** Platypelloid (3%). * **Direct OP:** Associated with Anthropoid pelvis (favorable prognosis for vaginal delivery). * **Deep Transverse Arrest:** Most common in Platypelloid and Android pelvis. * **Caldwell-Moloy Classification:** The standard system used to classify pelvic shapes based on the inlet.

Question 580: Which of the following statements accurately describes the instrumental delivery system?

A. Forceps are only used when the cervix is fully dilated.
B. Ventouse (vacuum extraction) is used when forceps are not suitable or have failed. (Correct Answer)
C. Ventouse can be used in rotational deliveries for occipito-posterior and transverse presentations.
D. Forceps can be used in breech deliveries.

Explanation: **Explanation:** Instrumental vaginal delivery (IVD) is a critical skill in obstetrics, used to shorten the second stage of labor for maternal or fetal indications. **Why Option B is Correct:** Ventouse (vacuum extraction) is often considered the instrument of choice when forceps are contraindicated or have failed, provided there is no immediate fetal distress. It is generally less traumatic to the mother (lower risk of 3rd/4th-degree tears) compared to forceps. However, if a vacuum attempt fails, a trial of forceps may be considered by an experienced clinician, though moving from one instrument to another increases the risk of fetal trauma. **Analysis of Incorrect Options:** * **Option A:** While forceps are primarily used at full dilation, they can also be used in specific scenarios like the **after-coming head of a breech** (Piper’s forceps), where the cervix may not be "fully dilated" in the traditional sense of the second stage of cephalic labor. * **Option C:** This is a common distractor. Ventouse is **contraindicated** in face presentations and is generally not recommended for rotations in transverse or posterior positions unless using a specific Malmström cup. Forceps (like Kielland’s) are the traditional choice for rotational deliveries. * **Option D:** This statement is actually **clinically true** (Piper’s forceps are used for breech). However, in the context of standard NEET-PG questioning, Option B is often highlighted as the "functional" relationship between the two instruments in a trial of instrumental delivery. *(Note: In some exam patterns, D is also considered correct; however, B represents the procedural hierarchy).* **High-Yield Clinical Pearls for NEET-PG:** * **Prerequisites for IVD:** Remember the mnemonic **FORCEPS** (Fetus alive, Os fully dilated, Ruptured membranes, Cephalic presentation, Engaged head, Position known, Sphincter/Bladder empty). * **Contraindications for Ventouse:** Prematurity (<34 weeks due to risk of intraventricular hemorrhage), face presentation, and fetal bleeding disorders. * **Preferred Instrument:** Forceps are preferred in cases of fetal distress because they allow for a quicker delivery compared to the multiple contractions often required for vacuum extraction.

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

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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

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Obstetric Emergencies

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Postpartum Hemorrhage Management

Practice Questions

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