Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 1091: What percentage of women typically deliver on their Estimated Due Date (EDD)?

A. 15%
B. 5% (Correct Answer)
C. 20%
D. 10%

Explanation: ***5%*** - Only about **5% of women** deliver on their **exact Estimated Due Date (EDD)**. - The EDD is calculated using **Naegele's rule** (280 days from LMP) and serves as an **approximation** rather than a precise prediction. - Most women deliver within a **37-42 week window**, with the majority occurring in the **2 weeks before or after** the EDD. - This reflects the **natural biological variation** in pregnancy duration. *10%* - This percentage is **higher than the actual rate** of delivery on the exact EDD. - While 10% might seem plausible for deliveries within a few days of the EDD, it overestimates delivery on that specific date. *15%* - This percentage **significantly overestimates** the likelihood of delivering precisely on the EDD. - The probability of birth on one specific day out of a several-week delivery window is relatively low. *20%* - This is a substantial **overestimation** of the probability of delivering on the EDD. - The EDD represents a **single day** in a term pregnancy window (37-42 weeks), making such a high percentage statistically unlikely.

Question 1092: Which fetal presentation is the rarest?

A. Cephalic
B. Breech
C. Shoulder (Correct Answer)
D. Face

Explanation: ***Shoulder*** - **Shoulder presentation** (also known as a **transverse lie**) occurs in approximately **0.3% of pregnancies** at term, making it the rarest presentation among the major fetal lie categories. - In this presentation, the fetal long axis is perpendicular to the maternal long axis, and the **shoulder** is typically the presenting part. - Vaginal delivery is not possible, and **cesarean section is mandatory**. *Cephalic* - **Cephalic presentation** is the most common presentation, occurring in about **95% of pregnancies**. - In this presentation, the fetal head is directed downwards towards the maternal pelvis. - This includes vertex, face, brow, and other head-first presentations. *Breech* - **Breech presentation** occurs when the fetal buttocks or feet are the presenting part, seen in about **3-4% of term pregnancies**. - While less common than cephalic, it is significantly more frequent than shoulder presentation. - Includes frank, complete, and footling breech variants. *Face* - **Face presentation** is a rare variant of cephalic presentation where the **fetal face** (chin/mentum) is the presenting part, occurring in about **0.2-0.3% of deliveries**. - The fetal head is hyperextended, with the occiput against the fetal back. - While rare, it is still slightly more common than shoulder presentation in some studies.

Question 1093: Palmer sign is related to ?

A. Increased pulsations in uterine arteries
B. Bluish discoloration of cervix and vagina
C. Softening of the cervix during pregnancy
D. Uterine contractions palpable through rectum during labor (Correct Answer)

Explanation: ***Uterine contractions palpable through rectum during labor*** - **Palmer sign** refers to the palpation of **uterine contractions** through the rectum, particularly during the early stages of labor or even in simulated labor pains. - This sign is an indicator used to assess uterine activity, especially when vaginal examination might be less informative or desired. *Softening of the cervix during pregnancy* - This describes **Goodell's sign**, which is caused by increased vascularity and edema of the cervix during early pregnancy. - While an important sign of pregnancy, it is not referred to as Palmer sign. *Bluish discoloration of cervix and vagina* - This phenomenon is known as **Chadwick's sign**, resulting from increased blood flow to the reproductive organs during pregnancy. - It is an early indication of pregnancy but distinct from the uterine contraction palpation. *Increased pulsations in uterine arteries* - This is known as **Osiander’s sign** or **uterine souffle**, characterized by a soft blowing sound over the uterus due to increased blood flow through the uterine arteries. - It is a vascular sign of pregnancy and not related to uterine contractions felt rectally.

Question 1094: What is the most common complication that can arise from vacuum delivery during childbirth?

A. Subgaleal hemorrhage
B. Scalp lacerations
C. Cephalohematoma (Correct Answer)
D. Retinal hemorrhages

Explanation: ***Cephalohematoma*** - A cephalohematoma is a collection of blood between the **periosteum and the skull bone**, typically forming over the parietal bone. - It is the **most common complication** of vacuum delivery, occurring in **6-26% of vacuum-assisted deliveries**. - It presents as a firm, fluctuant swelling that **does not cross suture lines** and typically appears several hours after delivery. - Usually **self-limiting** and resolves spontaneously over weeks to months, though it may be associated with hyperbilirubinemia. *Subgaleal hemorrhage* - This is a more serious but **less common** complication (0.4-0.6% incidence) involving bleeding into the **potential space between the galea aponeurotica and the periosteum**. - Can lead to significant blood loss and hypovolemic shock due to the large potential space that can accommodate substantial blood volume. - Requires immediate recognition and management, but its lower incidence makes it less common than cephalohematoma. *Scalp lacerations* - Occur in approximately **13% of vacuum deliveries** but are less common than cephalohematoma. - Typically superficial and heal well with minimal intervention. - Result from the rim of the vacuum cup causing trauma to the scalp tissue. *Retinal hemorrhages* - Occur in up to **40-50% of all vaginal deliveries** (both spontaneous and assisted), making them common but not specific to vacuum delivery. - Usually **asymptomatic and self-limiting**, resolving within days to weeks without sequelae. - While common, cephalohematoma remains the most frequently documented **specific complication** of vacuum extraction.

Question 1095: Which of the following pelvic measurements is most commonly used in clinical practice?

A. Diagonal conjugate (Correct Answer)
B. Transverse diameter of outlet
C. Oblique diameter of pelvis
D. Anteroposterior diameter of inlet

Explanation: ***Diagonal conjugate*** - This measurement is the most commonly used in clinical practice due to its **accessibility** and ability to estimate the **obstetrical conjugate**, which indicates the true AP diameter of the pelvic inlet. - It is measured vaginally from the **lower border of the symphysis pubis** to the **sacral promontory**. *Anteroposterior diameter of inlet* - This measurement, also known as the **obstetrical conjugate**, truly represents the narrowest AP diameter for fetal passage through the inlet. - However, it cannot be measured directly clinically and must be estimated from the diagonal conjugate or imaging. *Transverse diameter of outlet* - This measurement is important for assessing the **midpelvis** and **pelvic outlet**, but it is less commonly the primary measurement used for initial pelvic assessment compared to the diagonal conjugate. - A compromised transverse diameter can indicate a generally contracted pelvis or **android/anthropoid pelvic shapes**, which may lead to obstructed labor. *Oblique diameter of pelvis* - The oblique diameter provides information about the **symmetry of the pelvis**, but it is not routinely measured clinically unless there is suspicion of pelvic asymmetry or disease. - Significant asymmetry, often due to injury or disease (e.g., **scoliosis**, polio), can complicate labor by misdirecting the fetal head.

Question 1096: What is the presenting part in a transverse lie?

A. Shoulder (Correct Answer)
B. Face
C. Vertex
D. Brow

Explanation: ***Shoulder*** - In a **transverse lie**, the fetal **shoulder** is the part that presents over the pelvic inlet. - This occurs when the fetal long axis is 90 degrees to the maternal spine. *Face* - A **face presentation** is a type of **cephalic presentation** where the head is hyperextended, and the face is the presenting part. - This is not characteristic of a transverse lie. *Vertex* - A **vertex presentation** is the most common and ideal **cephalic presentation**, where the head is flexed and the top of the head (vertex) is the presenting part. - This indicates a longitudinal lie, not a transverse lie. *Brow* - A **brow presentation** is also a type of **cephalic presentation** where the fetal head is partially extended, and the brow is the presenting part. - Like vertex and face presentations, this occurs with a longitudinal fetal lie.

Question 1097: Least common presentation of twins?

A. Both breech
B. Both transverse (Correct Answer)
C. First vertex and 2nd transverse
D. Both vertex

Explanation: ***Correct: Both transverse*** - A **transverse lie** means both fetuses are positioned horizontally across the uterus - This is the **rarest twin presentation**, occurring in approximately **0.5% of twin pregnancies** - The limited uterine space and natural tendency of fetuses to settle into longitudinal positions makes this presentation exceptionally uncommon - **Management**: Requires cesarean delivery due to impossibility of vaginal birth with both twins transverse *Incorrect: Both breech* - **Breech presentation** (feet or buttocks first) is more common in twin pregnancies than in singletons - Occurs in approximately **5-10% of twin pregnancies** - While complicated, both twins being breech is **significantly more common** than both transverse *Incorrect: First vertex and 2nd transverse* - The **first twin being cephalic (vertex)** is the most favorable and common position - The **second twin presenting transversely** can occur after delivery of the first twin when increased intrauterine space allows position change - This combination is **more common than both transverse** but requires careful management of the second twin *Incorrect: Both vertex* - **Vertex presentation for both twins** (both head-down) is the **most common presentation**, occurring in **40-45% of twin pregnancies** - This is the **optimal presentation for vaginal delivery** - Offers the best outcomes with lowest intervention rates

Question 1098: Caput succedaneum indicates that the fetus was alive until which point?

A. Immediately after birth (Correct Answer)
B. Till 2-3 days after birth
C. 2-3 weeks after birth
D. 2-3 months after birth

Explanation: ***Immediately after birth*** - **Caput succedaneum** is a benign condition characterized by a **diffuse, edematous swelling** of the fetal scalp, crossing suture lines. - It results from pressure on the fetal head during vertex delivery, causing **extravasation of fluid** into the subcutaneous tissue, indicating the fetus was alive and circulating blood until birth. *Till 2-3 days after birth* - This option is incorrect because **caput succedaneum** is a direct consequence of the **birthing process** itself, forming during labor and delivery. - The presence of this scalp swelling signifies that the baby was alive and experienced the forces of birth, not that it survived for several days afterward. *2-3 weeks after birth* - This option is incorrect as **caput succedaneum** typically resolves within a few days of birth. - Its presence is a temporary finding related to the immediate perinatal period and does not indicate survival for several weeks. *2-3 months after birth* - This option is incorrect because **caput succedaneum** is a transient condition appearing at birth and usually disappearing within a few days. - It has no implication for the baby's survival beyond the immediate postnatal period, let alone for several months.

Question 1099: Which of the following is a recognized method for the delivery of the after-coming head of a breech?

A. Burns and Marshall method
B. Malar flexion and shoulder traction
C. Forceps method
D. Mauriceau-Smellie-Veit maneuver (Correct Answer)

Explanation: ***Mauriceau-Smellie-Veit maneuver*** - The **Mauriceau-Smellie-Veit maneuver** is the **gold standard** and most widely recognized method for delivering the after-coming head in breech delivery. - The technique involves the accoucheur placing the **index and middle fingers over the maxilla** (malar eminence) to flex the fetal head, while the fetal body rests on the forearm. - An assistant applies **suprapubic pressure** to maintain flexion of the fetal head. - This method provides excellent **control of the fetal head** and maintains proper flexion to prevent extension and facilitate safe delivery. *Burns and Marshall method* - The **Burns-Marshall method** is also a recognized technique for assisted breech delivery, but it is typically used when the body delivers spontaneously. - This method involves holding the fetal feet and allowing the baby to hang by its own weight, promoting flexion, then sweeping the baby upward over the maternal abdomen. - While valid, it is generally considered an **alternative** to the Mauriceau-Smellie-Veit maneuver rather than the primary method. *Forceps method* - **Piper forceps** are specifically designed for the after-coming head and are a recognized method, particularly when manual methods fail or in cases of **fetal distress**. - However, forceps application requires specific expertise and may not be the first-line approach in all settings. - When used appropriately, forceps provide controlled delivery and protect the fetal head. *Malar flexion and shoulder traction* - This is **not a recognized standard method** as described. - While malar pressure is used in the Mauriceau-Smellie-Veit maneuver, **shoulder traction** is dangerous and can cause **brachial plexus injury**, **Erb's palsy**, or **spinal cord damage**. - Traction should never be applied to the shoulders during breech delivery.

Question 1100: In which period is maternal mortality highest?

A. Antepartum
B. Peripartum (Correct Answer)
C. Postpartum
D. No period of maximum risk

Explanation: ***Peripartum*** - The peripartum period encompasses the time immediately before, during, and after childbirth, when the risks of **hemorrhage, infection, pre-eclampsia/eclampsia**, and other **acute obstetric complications** are highest. - The **physiological stresses** of labor and delivery, coupled with potential complications like **uterine atony** or **obstructed labor**, contribute significantly to maternal mortality during this critical window [2]. *Antepartum* - While complications like **severe pre-eclampsia, ectopic pregnancy**, and chronic conditions can occur during the antepartum period, the **acute risks of hemorrhage and infection** are generally lower than during and immediately after delivery [1]. - Most maternal deaths occurring antepartum are due to conditions that ultimately lead to or manifest more severely during the peripartum or postpartum phases, such as undetected pre-eclampsia worsening to eclampsia [3]. *Postpartum* - The postpartum period (especially the first 42 days) also carries significant risks such as **late postpartum hemorrhage, puerperal sepsis, and thromboembolism** [2]. - While substantial, the **magnitude of mortality risk** primarily due to acute events related to labor and delivery (e.g., massive hemorrhage, amniotic fluid embolism) is often concentrated in the peripartum period [2]. *No period of maximum risk* - This statement is incorrect because maternal mortality risk is demonstrably **higher during specific periods** related to pregnancy and childbirth, rather than being evenly distributed [1]. - The physiological changes and obstetric challenges associated with gestation, labor, and the puerperium create distinct periods of elevated risk for maternal morbidity and mortality.

Practice by Chapter

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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