Labor and Delivery Practice Questions

Q: Which of the following measurements at the pelvic inlet can be assessed directly?

Diagonal conjugate. **Explanation:** In clinical pelvimetry, the **Diagonal Conjugate** is the only anteroposterior diameter of the pelvic inlet that can be measured directly during a per-vaginal (PV) examination [1]. It is defined as the distance from the lower border of the pubic symphysis to the sacral promontory. In a normal pelvis, this measures approximately **12 cm**. **Why the other options are incorrect:** * **Anatomical Conjugate (True Conjugate):** This is the distance from the upper border of the pubic symphysis to the sacral promontory (approx. 11 cm). It cannot be measured clinically because the bladder and soft tissues are in the way; it is usually calculated by subtracting 1.5–2 cm from the diagonal conjugate. * **Obstetric Conjugate:** This is the shortest diameter through which the fetal head must pass (from the posterior surface of the pubic symphysis to the sacral promontory, approx. 10.5 cm). It is the most important diameter for labor but cannot be measured directly; it is calculated by subtracting 1.5 cm from the diagonal conjugate [1]. * **Bispinous Diameter:** This is a measurement of the **pelvic outlet/mid-cavity** (between the two ischial spines), not the pelvic inlet [1]. **High-Yield NEET-PG Pearls:** * **Clinical Assessment:** To measure the diagonal conjugate, the clinician attempts to touch the sacral promontory with the middle finger while the index finger rests against the lower border of the symphysis [2]. If the promontory cannot be reached, the pelvis is likely "adequate" for vaginal delivery. * **Narrowest Diameter:** The Obstetric Conjugate is the narrowest AP diameter of the inlet. * **Transverse Diameter:** The widest diameter of the pelvic inlet (approx. 13 cm) [1].

Q: External cephalic version is contraindicated in all of the following conditions except?

Breech presentation. **Explanation:** **External Cephalic Version (ECV)** is a procedure performed to manually convert a malpresentation (usually breech or transverse) into a cephalic presentation by manipulating the fetus through the maternal abdominal wall. **Why "Breech Presentation" is the correct answer:** Breech presentation is the **primary indication** for performing an ECV, not a contraindication. The goal of the procedure is to reduce the incidence of breech vaginal deliveries and Cesarean sections by turning the baby into a head-first position. **Analysis of Contraindications (Incorrect Options):** * **Antepartum Hemorrhage (Option A):** ECV is contraindicated because the manipulation can exacerbate placental abruption or cause further bleeding in cases of placenta previa. * **Multiple Pregnancy (Option B):** There is a high risk of cord entanglement, placental abruption, or premature rupture of membranes. ECV is generally only considered for the second twin *after* the first has been delivered. * **Ruptured Membranes (Option D):** Adequate amniotic fluid is essential to act as a lubricant for the fetus to turn. Once membranes have ruptured (Oligohydramnios), there is no space for rotation, and the risk of cord prolapse or fetal distress increases significantly. **High-Yield Clinical Pearls for NEET-PG:** * **Ideal Timing:** ECV is performed at **≥37 weeks** to minimize the risk of preterm labor and ensure that if an emergency C-section is required, the fetus is term. * **Prerequisites:** Reactive NST (fetal well-being), adequate liquor (AFI >5), and no uterine anomalies. * **Tocolysis:** Use of beta-mimetics (e.g., Terbutaline) increases the success rate by relaxing the uterus. * **Absolute Contraindications:** Placenta previa, previous classical C-section, oligohydramnios, and non-reassuring fetal heart rate.

Q: Maternal mortality is maximum in which period?

Peripartum. **Explanation:** The **peripartum period** (specifically the time of labor, delivery, and the immediate 24 hours following birth) is the most critical window for maternal survival. This is because the physiological stress on the maternal cardiovascular and respiratory systems peaks during labor. Most life-threatening complications, such as **Postpartum Hemorrhage (PPH)**—the leading cause of maternal mortality worldwide—and **Amniotic Fluid Embolism**, occur during this narrow timeframe. Additionally, the sudden hemodynamic shifts following placental delivery can trigger heart failure in women with underlying cardiac disease. **Analysis of Options:** * **Antepartum (Option A):** While conditions like pre-eclampsia or antepartum hemorrhage can occur, they are usually managed or stabilized before they become fatal, or they transition into peripartum emergencies. * **Postpartum (Option C):** While the majority of maternal deaths occur in the "extended" postpartum period (up to 42 days), the *intensity* and *concentration* of mortality are highest in the immediate peripartum phase. If "Postpartum" is used broadly, it is a major contributor, but "Peripartum" specifically captures the highest-risk moment of delivery. * **Peripartum (Option B):** This is the correct choice as it encompasses the "danger zone" of active labor and the immediate aftermath where the risk of hemorrhage and eclampsia is at its zenith. **High-Yield Clinical Pearls for NEET-PG:** * **Leading cause of Maternal Mortality (Global & India):** Postpartum Hemorrhage (PPH). * **Most common indirect cause of Maternal Mortality in India:** Anemia (though some recent data suggests Heart Disease is rising in specific cohorts). * **The "Golden Hour":** The first hour after delivery is the most critical for monitoring PPH. * **MMR Definition:** Number of maternal deaths per 1,00,000 live births.

Q: In a breech delivery, the aftercoming head of the baby can be arrested by all of the following mechanisms except?

Placenta previa. In a breech delivery, the "aftercoming head" refers to the fetal head being delivered last. Arrest of the aftercoming head is a critical obstetric emergency. ### Why Placenta Previa is the Correct Answer **Placenta previa** is a condition where the placenta is implanted in the lower uterine segment, obstructing the internal os. This is an absolute contraindication to vaginal delivery. Therefore, a patient with known placenta previa would undergo a **Planned Cesarean Section**. Since a vaginal breech delivery would not be attempted, the clinical scenario of an "arrested aftercoming head" during labor does not occur in this context. ### Explanation of Incorrect Options (Causes of Arrest) * **Extended Head (Option A):** This is the most common cause of arrest. If the head deflexes, larger diameters (mentovertical) attempt to pass through the pelvis instead of the smaller suboccipitobregmatic diameter, leading to obstruction. * **Hydrocephalus (Option B):** Fetal macrocephaly due to excess cerebrospinal fluid makes the head too large to fit through the pelvic brim or the cervix, causing mechanical arrest. * **Incomplete Dilatation of the Cervix (Option D):** Common in preterm breech. The smaller body slips through a partially dilated cervix, but the larger, non-compressible head gets trapped by the cervical rim (spasmodic contraction). ### NEET-PG High-Yield Pearls * **Management:** The **Mauriceau-Smellie-Veit maneuver** is the gold standard for delivering the aftercoming head (promotes flexion). * **Forceps:** **Piper’s forceps** are specifically designed for the aftercoming head. * **Entrapped Head:** If the cervix is the cause of arrest, **Dührssen incisions** (at 2, 6, and 10 o'clock) or a **Zavanelli maneuver** (replacement for C-section) may be considered. * **Burns-Marshall Method:** Used when the head is in the pelvic cavity; involves letting the baby hang to use gravity for flexion.

Q: Battledore placenta is associated with the highest risk of which complication?

Cord avulsion. **Explanation:** **Battledore Placenta** (also known as Marginal Insertion of the Cord) is a placental variation where the umbilical cord is attached at or within 2 cm of the placental margin rather than the center. **Why Cord Avulsion is the Correct Answer:** The primary clinical risk associated with a Battledore placenta occurs during the **third stage of labor**. Because the cord is attached to the thin peripheral edge of the placenta rather than the robust central mass, the attachment site is structurally weaker. When **Controlled Cord Traction (CCT)** is applied to deliver the placenta, the cord is prone to snapping or tearing away from the placental margin. This is known as **cord avulsion**, which can lead to a retained placenta and subsequent postpartum hemorrhage (PPH). **Analysis of Incorrect Options:** * **A. Fetal anomalies:** While abnormal cord insertions (like Velamentous insertion) are sometimes associated with anomalies, Battledore placenta itself is generally considered a benign variation for the fetus in utero. * **C. Uterine inversion:** This is typically caused by excessive fundal pressure or strong traction on a *centrally* attached cord in a relaxed uterus, not specifically linked to marginal insertion. * **D. Single umbilical artery:** This is a vascular anomaly of the cord itself and does not have a direct causal link with the site of placental insertion. **High-Yield Clinical Pearls for NEET-PG:** * **Incidence:** Occurs in approximately 7–9% of singleton pregnancies. * **Velamentous Insertion vs. Battledore:** In Velamentous insertion, the cord inserts into the fetal membranes (risking **Vasa Previa**); in Battledore, it inserts into the placental mass, but at the very edge. * **Management:** If a Battledore placenta is suspected, the clinician should exercise extreme caution during the third stage of labor, using very gentle traction to avoid avulsion.

Q: Active management of the third stage of labor is indicated for all of the following conditions EXCEPT?

Delivery of the first baby of twins. **Explanation:** The **Active Management of the Third Stage of Labor (AMTSL)** is a standard protocol designed to prevent Postpartum Hemorrhage (PPH). It involves the administration of a uterotonic (usually Oxytocin), controlled cord traction, and uterine massage. **Why "Delivery of the first baby of twins" is the correct answer:** AMTSL is strictly **contraindicated** after the delivery of the first twin. Administering a uterotonic agent at this stage can cause hypertonic uterine contractions, leading to **fetal distress, placental abruption, or birth canal entrapment** of the second twin. AMTSL should only be initiated after the delivery of the **last** baby. **Analysis of Incorrect Options:** * **A, B, and C (Rh incompatibility, Diabetic mother, Prolonged pregnancy):** These are all singleton pregnancy scenarios or conditions where the delivery of the fetus is complete. In these cases, AMTSL is not only indicated but highly recommended. In fact, conditions like a large baby (diabetic mother) or polyhydramnios (often associated with Rh isoimmunization) increase the risk of uterine atony, making AMTSL crucial to prevent PPH. **Clinical Pearls for NEET-PG:** * **Components of AMTSL (WHO):** 1. Uterotonic administration (Oxytocin 10 IU IM is the drug of choice), 2. Delayed cord clamping (1–3 mins), 3. Controlled Cord Traction (Brandt-Andrews maneuver). * **Timing:** Oxytocin should be given within 1 minute of the birth of the (last) baby, after ruling out the presence of another fetus. * **Twin Pregnancy Rule:** Always palpate the abdomen after the first twin to confirm the lie of the second twin; never give ergometrine or oxytocin until the uterus is empty.

Q: Regarding precipitous labor, which of the following statements is FALSE?

Neonatal outcome is uniformly good. **Explanation:** **Precipitous labor** is defined as labor that lasts for **less than 3 hours** from the onset of regular contractions to the expulsion of the fetus. **Why Option C is the Correct Answer (The False Statement):** Contrary to the statement, neonatal outcomes in precipitous labor are **not** uniformly good. The rapid descent and delivery pose significant risks to the newborn, including: * **Intracranial Hemorrhage:** Sudden changes in pressure on the fetal head during rapid transit through the birth canal can lead to dural tears. * **Fetal Hypoxia:** Intense, frequent contractions (uterine tachysystole) reduce placental perfusion, leading to fetal distress. * **Aspiration:** Rapid delivery may lead to the aspiration of amniotic fluid. * **Erb’s Palsy:** Increased risk of shoulder dystocia due to lack of time for fetal rotation. **Analysis of Other Options:** * **Option A:** This is the standard clinical definition of precipitous labor. * **Option B:** Following such rapid and intense contractions, the myometrium can become "exhausted," leading to **uterine atony** and subsequent postpartum hemorrhage (PPH). * **Option D:** The lack of time for the soft tissues of the birth canal to stretch gradually often results in extensive **lacerations** of the cervix, vagina, and perineum. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** Multiparity, strong uterine contractions, and low birth weight. * **Complications:** Maternal (PPH, Uterine rupture, Amniotic fluid embolism) and Fetal (Intracranial hemorrhage, Erb’s palsy). * **Management:** If anticipated, the goal is to control the delivery of the head to prevent perineal tears and intracranial injury. Tocolytics may be used if contractions are excessively frequent.

Q: All of the following drugs are effective for cervical ripening during pregnancy except:

Progesterone. **Explanation:** The correct answer is **Progesterone**. Cervical ripening is the process of softening, effacing, and dilating the cervix, which involves the breakdown of collagen fibers and an increase in glycosaminoglycans. **Why Progesterone is the correct answer:** Progesterone is known as the "hormone of pregnancy" because it maintains **uterine quiescence**. It inhibits cervical ripening by decreasing collagenase activity and stabilizing the cervical extracellular matrix. In clinical practice, progesterone (e.g., vaginal progesterone or 17-OHP) is actually used to *prevent* preterm birth by keeping the cervix firm and closed. Therefore, it is not used for ripening. **Analysis of other options:** * **Prostaglandin E2 (Dinoprostone):** This is the gold standard for cervical ripening. It acts by breaking down collagen and increasing submucosal water content. It is available as intracervical gels or vaginal inserts. * **Misoprostol (Prostaglandin E1):** A highly effective synthetic prostaglandin used for both cervical ripening and labor induction. It is cost-effective and can be administered orally or vaginally. * **Oxytocin:** While primarily used for the induction and augmentation of uterine contractions, high-dose oxytocin can indirectly aid in cervical changes once the ripening process has begun. However, compared to progesterone, it is a recognized agent in the management of labor. **High-Yield Clinical Pearls for NEET-PG:** * **Bishop Score:** Used to assess the "favorability" of the cervix. A score of $\leq$ 6 indicates an unfavorable cervix requiring ripening agents. * **Mechanical Methods:** Foley catheter induction and laminaria tents are non-pharmacological alternatives for ripening. * **Mifepristone:** An anti-progesterone that *can* be used for cervical ripening (especially in intrauterine fetal death) because it antagonizes the stabilizing effect of progesterone.

Question 1

Which of the following measurements at the pelvic inlet can be assessed directly?

Accepted Answer

Diagonal conjugate

Answer

Obstetric conjugate

Answer

Anatomical conjugate

Answer

Bisspinous conjugate

Question 2

External cephalic version is contraindicated in all of the following conditions except?

Accepted Answer

Breech presentation

Answer

Antepartum hemorrhage

Answer

Multiple pregnancy

Answer

Ruptured membranes

Question 3

Maternal mortality is maximum in which period?

Accepted Answer

Peripartum

Answer

Antepartum

Answer

Postpartum

Answer

None of the above

Question 4

Induction of labour is indicated in all of the following conditions except?

Accepted Answer

Heart disease

Answer

Diabetes

Answer

Hypertension

Answer

Renal disease

Question 5

In a breech delivery, the aftercoming head of the baby can be arrested by all of the following mechanisms except?

Accepted Answer

Placenta previa

Answer

Extended head

Answer

Hydrocephalus

Answer

Incomplete dilatation of the cervix

Question 6

Battledore placenta is associated with the highest risk of which complication?

Accepted Answer

Cord avulsion

Answer

Fetal anomalies

Answer

Uterine inversion

Answer

Single umbilical artery

Question 7

Active management of the third stage of labor is indicated for all of the following conditions EXCEPT?

Accepted Answer

Delivery of the first baby of twins

Answer

Rh incompatibility

Answer

Diabetic mother

Answer

Prolonged pregnancy

Question 8

Regarding precipitous labor, which of the following statements is FALSE?

Accepted Answer

Neonatal outcome is uniformly good

Answer

An expulsion of the fetus in less than 3 hours

Answer

Can be frequently followed by uterine atony

Answer

May be associated with uterine, cervical, or vaginal lacerations

Question 9

All of the following drugs are effective for cervical ripening during pregnancy except:

Accepted Answer

Progesterone

Answer

Prostaglandin E2

Answer

Oxytocin

Answer

Misoprostol

Question 10

Induction of labor at term is not indicated in which of the following conditions?

Accepted Answer

Preeclampsia

Answer

Diabetes Mellitus

Answer

Heart disease

Answer

Renal disease

Labor and Delivery — MCQs

Labor and Delivery — MCQs

On this page

Practice by Chapter

Want unlimited practice?