Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 241: Bandl's ring is associated with which of the following?

A. Cephalopelvic disproportion (Correct Answer)
B. Fetal death
C. Uterine inertia
D. Placenta previa

Explanation: **Explanation:** **Bandl’s Ring** (Pathological Retraction Ring) is a hallmark sign of **obstructed labor**. It occurs when there is a physical barrier to the descent of the fetus, most commonly due to **Cephalopelvic Disproportion (CPD)** or malpresentation. 1. **Why A is correct:** In obstructed labor, the upper uterine segment contracts and thickens vigorously to overcome the obstruction, while the lower uterine segment becomes progressively thinner and distended. The junction between these two segments becomes visible and palpable as a horizontal ridge known as Bandl’s ring. If the obstruction (CPD) is not relieved, this leads to imminent uterine rupture. 2. **Why B is incorrect:** While fetal death can occur as a *consequence* of prolonged obstructed labor, it is not the cause of Bandl’s ring. 3. **Why C is incorrect:** Uterine inertia refers to weak or absent contractions. Bandl’s ring requires *hyperactive* contractions of the upper segment; in inertia, the uterus is too weak to form a retraction ring. 4. **Why D is incorrect:** Placenta previa is a cause of antepartum hemorrhage. While it may necessitate a C-section, it does not typically present with the hyper-contractile state seen in obstructed labor unless labor is allowed to progress against an obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Bandl’s ring is situated at the junction of the upper and lower uterine segments. * **Clinical Sign:** It is a late sign of obstructed labor and a warning of **impending uterine rupture**. * **Management:** Immediate delivery, usually via **Emergency Cesarean Section**. * **Distinction:** Do not confuse it with a **Constriction Ring**, which is a localized spasm of the uterine muscle that can occur at any level and is not associated with uterine rupture.

Question 242: In which type of abortion does the gestational age correspond to the uterine size?

A. Threatened (Correct Answer)
B. Inevitable
C. Complete
D. Mixed

Explanation: In clinical practice, comparing uterine size to the period of amenorrhea (POA) is a high-yield diagnostic tool for differentiating types of abortion. ### **Why Threatened Abortion is Correct** In **Threatened Abortion**, the pregnancy is still viable. The fetus is alive, the cervical os remains closed, and the products of conception (POC) are entirely intact within the uterine cavity. Because no tissue has been expelled and the gestational sac continues to develop, the **uterine size corresponds to the gestational age.** ### **Why Other Options are Incorrect** * **Inevitable Abortion:** While the POC are still inside, there is often associated cervical dilation and significant hemorrhage. In some cases, the uterus may feel slightly smaller due to the rupture of membranes or beginning of expulsion, though it is primarily distinguished from threatened abortion by the *open* cervical os. * **Complete Abortion:** All products of conception have been expelled. Consequently, the uterus is empty and contracted, making the **uterine size significantly smaller** than the period of amenorrhea. * **Missed Abortion (often confused with 'Mixed'):** The fetus has died but is retained. Over time, the amniotic fluid is absorbed and the placenta atrophies, leading to a **uterine size smaller** than the gestational age. ### **High-Yield Clinical Pearls for NEET-PG** * **Uterine Size < POA:** Missed abortion, Incomplete abortion, Complete abortion. * **Uterine Size > POA:** Molar pregnancy, Multiple pregnancy, Polyhydramnios, or incorrect dates. * **Cervical Os:** It is **closed** in Threatened and Missed abortions; it is **open** in Inevitable and Incomplete abortions. * **Management:** Threatened abortion is managed conservatively with bed rest and follow-up; Inevitable abortion requires suction evacuation.

Question 243: In which fetal presentation can vaginal delivery be expected?

A. Face presentation when the chin lies directly to the sacrum
B. Brow presentation
C. Shoulder presentation
D. Face presentation when the chin lies under the symphysis pubis (Correct Answer)

Explanation: **Explanation:** In **Face Presentation**, the fetal head is hyper-extended, making the **mentum (chin)** the denominator. The possibility of vaginal delivery depends entirely on the position of the mentum relative to the maternal pelvis. 1. **Why Option D is Correct:** In **Mentum Anterior (MA)** positions (chin under the symphysis pubis), the fetal neck can further extend to accommodate the pelvic curve. Once the chin is born under the symphysis, the head can flex to deliver the vertex and occiput. Approximately 60–80% of face presentations are mentum anterior and result in successful vaginal delivery. 2. **Why Other Options are Incorrect:** * **Option A (Mentum Posterior):** If the chin lies toward the sacrum, the short fetal neck (approx. 5 cm) cannot span the length of the maternal sacrum (approx. 12 cm). The head is already maximally extended and cannot extend further; the shoulders enter the pelvis, causing **impaction**. Vaginal delivery is impossible unless the position rotates spontaneously to anterior. * **Option B (Brow Presentation):** This is the most unfavorable presentation. The engaging diameter is the **Mentovertical (13.5 cm)**, which exceeds the average diameters of the pelvic inlet. Unless it converts to a face or vertex presentation, a persistent brow requires a Cesarean section. * **Option C (Shoulder Presentation):** This occurs in transverse lies. A full-term fetus cannot be delivered vaginally in a transverse lie (risk of cord prolapse and uterine rupture); it necessitates a Cesarean section. **High-Yield Clinical Pearls for NEET-PG:** * **Engaging Diameter in Face:** Submentobregmatic (9.5 cm). * **Engaging Diameter in Brow:** Mentovertical (13.5 cm) – *Largest diameter.* * **Mnemonic:** "Mento-Post is a No-Go" (Mentum posterior cannot deliver vaginally). * **Common Association:** Anencephaly is a frequent cause of face presentation due to the lack of a cranium.

Question 244: True about intrauterine fetal death (IUD)?

A. Gas bubbles in great vessels
B. Halo's sign +ve
C. Overlapping of skull bones (Correct Answer)
D. Decreased amniotic fluid volume

Explanation: **Explanation:** Intrauterine Fetal Death (IUFD) is characterized by specific radiological signs that occur due to the cessation of circulation and subsequent degenerative changes in the fetus. **1. Why Option C is Correct:** **Spalding’s Sign** refers to the **overlapping of fetal skull bones**. It occurs due to the liquefaction of the brain matter and loss of intracranial pressure following fetal death. This sign typically appears 4–7 days after death. It is a classic radiological marker for IUFD, provided the mother is not in labor (as molding during labor can also cause overlapping). **2. Analysis of Incorrect Options:** * **Option A (Gas bubbles in great vessels):** This is known as **Robert’s Sign**. While it is a sign of IUFD, it is caused by the liberation of gas (CO2) from blood decomposition. However, it is an early sign (appearing within 12 hours) and is less commonly tested or specific compared to Spalding's sign in clinical scenarios. * **Option B (Halo’s Sign):** This refers to the elevation of the scalp fat layer due to edema, creating a "halo" appearance. While associated with IUFD (Deuel’s halo sign), it is non-specific and can also be seen in cases of fetal hydrops or maternal diabetes. * **Option D (Decreased amniotic fluid):** While oligohydramnios may be associated with the cause of death (e.g., renal agenesis or placental insufficiency), it is not a diagnostic radiological sign of the death itself. **Clinical Pearls for NEET-PG:** * **Earliest Sign of IUFD:** Robert’s Sign (Gas in the heart/great vessels). * **Most Common Sign:** Spalding’s Sign. * **Confirmatory Test of Choice:** Real-time Ultrasound showing absence of fetal cardiac activity. * **Spalding’s Sign Mimic:** Can be false-positive in a live fetus during active labor due to molding or in cases of severe dehydration.

Question 245: Regarding Braxton Hicks contractions, which of the following statements is correct?

A. Intensity varies between 20 and 40 mmHg.
B. Occur in early pregnancy and may be palpated in the second trimester. (Correct Answer)
C. These contractions become more regular later in pregnancy.
D. Both 'Occur in early pregnancy and may be palpated in the second trimester' and 'These contractions become more regular later in pregnancy'.

Explanation: **Explanation:** Braxton Hicks contractions are spontaneous, painless, and irregular uterine contractions that occur throughout pregnancy. They represent the physiological activity of the myometrium as it prepares for labor. **1. Why Option B is Correct:** Braxton Hicks contractions begin as early as the **6th week of gestation**, though they are not felt by the mother at this stage. By the **second trimester**, they become strong enough to be palpated during a bimanual or abdominal examination. They are characterized by being sporadic, non-rhythmic, and lacking the intensity to cause cervical effacement or dilation. **2. Why Other Options are Incorrect:** * **Option A:** The intensity of Braxton Hicks contractions is typically low, usually ranging between **5 and 25 mmHg**. An intensity of 20–40 mmHg is more characteristic of early active labor. * **Option C:** By definition, Braxton Hicks contractions remain **irregular** in frequency and duration. If contractions become regular, rhythmic, and increase in intensity/frequency, they are classified as "True Labor" or "False Labor" (pre-labor), rather than simple Braxton Hicks. * **Option D:** Since Option C is incorrect, this combined option is also incorrect. **NEET-PG High-Yield Pearls:** * **Distinguishing Feature:** Unlike true labor, Braxton Hicks contractions **disappear with walking**, hydration, or rest. * **Cervical Status:** They do **not** cause cervical dilation (the hallmark of true labor). * **False Labor:** In the final weeks, these contractions may become more frequent and uncomfortable, often referred to as "False Labor" or "Prelabor." * **Role:** They are thought to aid in the softening of the cervix and the development of the lower uterine segment.

Question 246: What cervical length is associated with an increased risk of preterm delivery?

A. 2.5 cm (Correct Answer)
B. 3.0 cm
C. 3.5 cm
D. 4.0 cm

Explanation: **Explanation:** The cervical length (CL) measured via **Transvaginal Ultrasound (TVS)** is a powerful predictor of spontaneous preterm birth (PTB). In a normal pregnancy, the cervix remains long and closed until near term. A cervical length of **<25 mm (2.5 cm)** before 24 weeks of gestation is the standard diagnostic threshold for a "short cervix," which significantly increases the risk of preterm delivery. **Why 2.5 cm is correct:** Statistically, 2.5 cm represents the 10th percentile for cervical length at mid-gestation. As the cervix shortens, the structural integrity of the birth canal is compromised, often preceded by "funneling" (protrusion of the amniotic sac into the internal os). Clinical trials have shown that women with a CL <25 mm benefit from interventions like **vaginal progesterone** or **cervical cerclage** to reduce PTB risk. **Analysis of Incorrect Options:** * **3.0 cm, 3.5 cm, and 4.0 cm:** These values are considered within the normal range during the second trimester. A cervix measuring 3.0 cm or more has a high negative predictive value, meaning the likelihood of delivery within the next 7–14 days is extremely low. **NEET-PG High-Yield Pearls:** * **Gold Standard Imaging:** Transvaginal Ultrasound (TVS) is superior to transabdominal ultrasound and digital examination for measuring CL. * **Timing:** Screening is typically performed between **18–24 weeks** of gestation. * **Management:** If CL <25 mm in a singleton pregnancy without prior PTB, **vaginal progesterone** is the treatment of choice. If there is a history of prior PTB and a short cervix, **cervical cerclage** (e.g., McDonald or Shirodkar technique) is indicated. * **Funneling:** The sequence of cervical change often follows the **T-Y-V-U** pattern (Trust Your Vaginal Ultrasound).

Question 247: Which of the following is NOT a complication of shoulder dystocia?

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

Explanation: ### Explanation **Why the correct answer is right:** In medical terminology and clinical practice, a condition cannot be a "complication" of itself. **Shoulder dystocia** is an obstetric emergency defined by the failure of the fetal shoulders to deliver after the head, despite routine traction. It is the *primary event* or the diagnosis itself, not a secondary consequence or complication resulting from the event. **Analysis of incorrect options:** * **A. Fetal death:** This is a severe complication of shoulder dystocia. Prolonged head-to-body delivery intervals lead to umbilical cord compression and fetal hypoxia, which can result in hypoxic-ischemic encephalopathy (HIE) or death. * **B. Uterine rupture:** While rare, uterine rupture can occur as a maternal complication due to the excessive fundal pressure (which is contraindicated) or the intense mechanical stress placed on the lower uterine segment during difficult maneuvers. * **C. Obstructed labor:** Shoulder dystocia is a classic form of obstructed labor where the bony pelvis (symphysis pubis) prevents the passage of the fetal shoulders. **Clinical Pearls for NEET-PG:** * **Definition:** Failure of the shoulders to deliver after the head due to impaction of the anterior shoulder behind the maternal symphysis pubis. * **Risk Factors:** Fetal macrosomia (most common), maternal obesity, gestational diabetes, and prolonged second stage of labor. * **Management (HELPERR Mnemonic):** 1. **McRoberts Maneuver:** Hyperflexion of maternal thighs (first-line; increases AP diameter of pelvic inlet). 2. **Suprapubic Pressure:** To dislodge the anterior shoulder. 3. **Woods Corkscrew/Rubin Maneuver:** Internal rotation of the fetus. 4. **Zavanelli Maneuver:** Cephalic replacement followed by C-section (last resort). * **Contraindication:** **Fundal pressure** is strictly contraindicated as it further impacts the shoulder and increases the risk of uterine rupture. * **Common Neonatal Complication:** Erb’s Palsy (C5-C6 injury).

Question 248: Which of the following is NOT an indication for urgent delivery of the second twin?

A. Abruptio placentae
B. Cord prolapse of the second baby
C. Inadvertent use of IV ergometrine with the delivery of the anterior shoulder of the first baby
D. Breech presentation of the second baby (Correct Answer)

Explanation: **Explanation:** The management of the second twin requires careful monitoring, but it is not inherently an emergency unless maternal or fetal compromise occurs. **Why Breech Presentation is the Correct Answer:** Breech presentation of the second twin is **not** an indication for urgent delivery. In fact, breech is a common and favorable presentation for the second twin. If the second twin is in breech, it can be delivered safely via **assisted breech delivery**. The cervix is already fully dilated from the first twin, making the delivery of the second twin (whether cephalic or breech) relatively straightforward. Urgent intervention is only required if there is fetal distress or a non-reassuring heart rate. **Analysis of Incorrect Options:** * **Abruptio Placentae:** The delivery of the first twin causes a sudden decrease in intrauterine volume, which can lead to premature separation of the placenta. This compromises the oxygen supply to the second twin, necessitating immediate delivery. * **Cord Prolapse:** If the umbilical cord of the second twin prolapses after the rupture of the second sac, it leads to cord compression and acute fetal hypoxia. This is a surgical/obstetric emergency requiring urgent delivery. * **Inadvertent IV Ergometrine:** Ergometrine causes tetanic (sustained) uterine contractions. If given prematurely (with the first twin), it can cause uterine hypertonicity, leading to fetal distress or trapping of the second twin. Immediate delivery is required to prevent fetal demise. **High-Yield Clinical Pearls for NEET-PG:** * **Time Interval:** There is no fixed "safe" time limit between twins, provided the fetal heart rate is stable. However, most clinicians aim for delivery within 30 minutes. * **Internal Podalic Version (IPV):** This is a classic procedure used for a **transverse** second twin to convert it to breech for delivery. * **Most Common Presentation:** Cephalic-Cephalic (approx. 40%). * **Locked Twins:** Most common when Twin 1 is Breech and Twin 2 is Cephalic.

Question 249: Bandle's ring on the uterus in labor suggests:

A. Cervical dystocia
B. Colicky uterus
C. Hypertonic lower uterine segment
D. Obstructed labor (Correct Answer)

Explanation: **Explanation:** **Bandl’s Ring** (Pathological Retraction Ring) is a hallmark clinical sign of **Obstructed Labor**. 1. **Why it occurs (The Mechanism):** During normal labor, the upper uterine segment contracts and shortens (retracts), while the lower uterine segment (LUS) thins and dilates. In obstructed labor, the upper segment continues to contract forcefully against an immovable fetus. To compensate, the LUS becomes excessively stretched and thin. The junction between the thickened upper segment and the over-distended lower segment becomes visible and palpable as a horizontal ridge—the Bandl’s Ring. This is a **pre-rupture sign**; if the obstruction is not relieved, the thinned LUS will rupture. 2. **Analysis of Incorrect Options:** * **Cervical Dystocia:** Refers to the failure of the cervix to dilate despite good contractions. While it can lead to obstruction, Bandl’s ring specifically signifies the uterine response to a mechanical block, not just a rigid cervix. * **Colicky Uterus:** This is a type of incoordinate uterine action where different parts of the uterus contract independently. It leads to ineffective labor but does not produce a pathological retraction ring. * **Hypertonic Lower Uterine Segment:** In this condition (reversed polarity), the LUS contracts more strongly than the fundus. This prevents dilation but does not cause the thinning and retraction associated with Bandl's ring. **Clinical Pearls for NEET-PG:** * **Location:** Bandl’s ring is usually felt between the symphysis pubis and the umbilicus. As obstruction worsens, the ring rises higher. * **Clinical Presentation:** Associated with maternal exhaustion, dehydration, and a "molding" of the uterus around the fetus. * **Management:** It is an obstetric emergency. Immediate delivery (usually via Cesarean Section) is mandatory to prevent uterine rupture. * **Physiological vs. Pathological:** A physiological retraction ring exists in all normal labors at the junction of the segments but is never visible or palpable clinically.

Question 250: Which of the following is not a contraindication for vaginal delivery after a previous cesarean section?

A. Previous classical cesarean section
B. No previous vaginal delivery
C. Breech presentation (Correct Answer)
D. Puerperal infection in the previous pregnancy

Explanation: **Explanation:** The core concept in managing a **Trial of Labor After Cesarean (TOLAC)** is assessing the risk of uterine rupture. A successful Vaginal Birth After Cesarean (VBAC) depends on the integrity of the previous uterine scar. **Why Breech Presentation is the Correct Answer:** Breech presentation is a **relative contraindication**, not an absolute one. While many clinicians prefer a repeat cesarean for breech presentation, it is not a strict contraindication to TOLAC if other criteria are met (e.g., frank breech, adequate pelvis). In the context of this question, it is the "least" contraindicated compared to the other options which either significantly increase rupture risk or are historical contraindications. **Analysis of Incorrect Options:** * **A. Previous Classical Cesarean Section:** This is an **absolute contraindication**. A classical (vertical) incision involves the upper muscular segment of the uterus, carrying a high risk of rupture (4–9%) before or during labor. * **B. No Previous Vaginal Delivery:** While a prior vaginal delivery is the single best predictor of a successful VBAC, the *absence* of one is not a contraindication. However, in many standardized exams, this is often listed as a factor that decreases the success rate but doesn't prohibit the trial. (Note: In some clinical contexts, this is considered a risk factor, but compared to a classical scar, it is permissible). * **D. Puerperal Infection:** A history of post-operative infection (endometritis) after the previous CS is traditionally considered a contraindication because infection impairs proper wound healing, potentially leading to a weaker, thinner scar that is more prone to rupture. **Clinical Pearls for NEET-PG:** * **Best candidate for VBAC:** A woman with one previous lower segment transverse incision (LSCS) and a prior successful vaginal delivery. * **Absolute Contraindications to TOLAC:** Previous classical or T-shaped incision, prior uterine rupture, extensive transfundal uterine surgery (e.g., myomectomy entering the cavity), and any contraindication to vaginal birth (e.g., placenta previa). * **Risk of Rupture:** LSCS scar (~0.5–1%) vs. Classical scar (~4–9%). * **Induction:** Prostaglandins (like Dinoprostone) are generally avoided in TOLAC 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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