Labor and Delivery Practice Questions

Q: Prolonged latent phase of labor is commonly seen in which of the following conditions?

Unripe cervix. The **Latent Phase** of labor begins with the onset of regular uterine contractions and ends when the cervix reaches 4–6 cm dilation. According to Friedman’s criteria, a prolonged latent phase is defined as **>20 hours in primigravida** and **>14 hours in multigravida**. ### Why "Unripe Cervix" is Correct: The primary physiological goal of the latent phase is **cervical effacement** and softening. An **unripe cervix** (low Bishop score) presents high resistance to uterine contractions. This lack of readiness necessitates a longer period of contractions to achieve the structural changes required for active dilation, making it the most common cause of a prolonged latent phase. ### Analysis of Incorrect Options: * **Excessive Sedation:** While early administration of analgesics or sedatives can slow down labor, it is a secondary factor. An unripe cervix remains the most frequent clinical finding associated with this delay. * **Placenta Previa:** This is a condition where the placenta covers the internal os. It is a contraindication to vaginal delivery and typically presents with painless antepartum hemorrhage, not a delay in the latent phase. * **Abruptio Placenta:** This involves premature separation of the placenta. It often leads to uterine hypertonicity and rapid (precipitate) labor or fetal distress, rather than a prolonged latent phase. ### High-Yield NEET-PG Pearls: * **Management:** The preferred management for a prolonged latent phase is **therapeutic rest** (e.g., Morphine) or **oxytocin augmentation**. It is *not* an indication for Cesarean section. * **Friedman vs. WHO:** While Friedman used 4 cm as the start of the active phase, the **WHO Labor Care Guide (2020)** now defines the active phase starting at **5 cm** dilation. * **Most common cause overall:** Unripe cervix at the onset of labor.

Q: Prelabour pains are mediated through which spinal nerve roots?

T10-T12. **Explanation:** The pain experienced during the first stage of labor (including prelabour or "false" pains) is primarily **visceral** in nature. It originates from the stretching of the lower uterine segment and the dilation of the cervix. 1. **Why T10–T12 is correct:** The sensory nerve fibers from the body of the uterus and the cervix travel alongside sympathetic nerves. They pass through the hypogastric plexus and enter the spinal cord via the **T10, T11, and T12** (and occasionally L1) spinal nerve roots. Therefore, pain during the early stages of labor is referred to the dermatomes supplied by these segments (the lower abdomen and lumbar region). 2. **Analysis of Incorrect Options:** * **T12–L3:** While there is some overlap at T12 and L1, the primary sensory input for uterine contractions does not extend down to L3. * **S2–S4 (Option C/S1-S3):** These roots mediate **somatic pain** during the **second stage of labor**. This pain is caused by the stretching of the pelvic floor, vagina, and perineum as the fetus descends, transmitted via the **pudendal nerve**. * **L3–L4:** These segments are generally not involved in the primary pain pathways for labor; they are more relevant for lower limb motor and sensory functions. **High-Yield Clinical Pearls for NEET-PG:** * **First Stage of Labor:** Pain is visceral, mediated by **T10–L1**. * **Second Stage of Labor:** Pain is both visceral (uterus) and somatic (perineum), mediated by **T10–L1 AND S2–S4**. * **Epidural Anesthesia:** To provide effective relief during the first stage, the block must reach the **T10** level. * **Paracervical Block:** Targets the Frankenhäuser’s plexus to relieve pain from cervical dilation (Stage 1) but does not relieve perineal pain (Stage 2).

Q: Which of the following is a contraindication for the use of ergometrine?

Heart disease. **Explanation:** Ergometrine (an ergot alkaloid) is a potent uterotonic used to prevent and treat postpartum hemorrhage (PPH). Its primary mechanism involves inducing tetanic uterine contractions and causing generalized **vasoconstriction**. **Why Heart Disease is the Correct Answer:** Ergometrine causes significant peripheral vasoconstriction and a sudden rise in blood pressure. This leads to a rapid increase in venous return (preload), which can overload a compromised heart, potentially triggering **acute heart failure, pulmonary edema, or arrhythmias**. It is also contraindicated in patients with severe hypertension and pre-eclampsia for the same reason. **Analysis of Incorrect Options:** * **A. Diabetes Mellitus:** There is no direct contraindication for ergometrine in diabetic patients, as it does not acutely interfere with glycemic control or insulin sensitivity. * **B. Excessive Post-partum Hemorrhage:** This is actually an **indication** for ergometrine. It is a second-line agent (after Oxytocin) used to manage atonic PPH due to its rapid and sustained contractile effect. * **C. Anaemia:** Anaemia is not a contraindication. In fact, preventing blood loss with uterotonics is crucial in anaemic patients who have low physiological reserves. **High-Yield Clinical Pearls for NEET-PG:** * **Route & Dose:** Usually 0.2 mg IM/IV. IV must be given very slowly. * **Side Effects:** Nausea, vomiting (most common), and transient hypertension. * **Storage:** It is light-sensitive and must be stored in a refrigerator (2–8°C). * **Contraindications Summary:** Heart disease, Hypertension (BP >140/90), Pre-eclampsia/Eclampsia, and Peripheral Vascular Disease (Raynaud’s). * **Active Management of Third Stage of Labor (AMTSL):** While Oxytocin is the drug of choice, Syntometrine (a combination of Oxytocin and Ergometrine) is sometimes used but carries the same cardiac risks.

Q: Which of the following drugs is not used for induction of labor?

Betamethasone. **Explanation:** The correct answer is **Betamethasone**. Induction of labor (IOL) refers to the artificial stimulation of uterine contractions before the onset of spontaneous labor to achieve vaginal delivery. **Why Betamethasone is the correct answer:** Betamethasone is a corticosteroid used in obstetrics for **Antenatal Corticosteroid Therapy (ACT)**. Its primary role is to accelerate fetal lung maturity by stimulating surfactant production in pregnancies at risk of preterm delivery (between 24 and 34 weeks). It has no role in inducing uterine contractions or cervical ripening. **Why the other options are used for induction:** * **Prostaglandin E2 (Dinoprostone):** This is the gold standard for cervical ripening. It acts by breaking down collagen and increasing submucosal water content in the cervix. It is available as intracervical gels or sustained-release vaginal inserts. * **Prostaglandin E1 (Misoprostol):** A synthetic PGE1 analogue. While originally used for peptic ulcers, it is highly effective for both cervical ripening and labor induction. It is administered vaginally or orally (25 mcg for IOL). * **Mifepristone (RU-486):** An anti-progestogen. By blocking progesterone receptors, it increases the sensitivity of the myometrium to prostaglandins and helps in cervical softening. It is often used for IOL in cases of intrauterine fetal death (IUFD). **High-Yield Clinical Pearls for NEET-PG:** * **Bishop Score:** Used to assess "inducibility." A score of $\geq$ 8 suggests a high likelihood of successful vaginal delivery. * **Oxytocin:** The drug of choice for induction when the cervix is already "favorable" (high Bishop score). * **Contraindication for Misoprostol:** It should **not** be used for induction in women with a previous Cesarean section due to the high risk of uterine rupture. * **Betamethasone Dosage:** 12 mg IM, two doses 24 hours apart.

Q: Hematuria during labor in a patient with a previous cesarean section is a sign of:

Impending rupture of scar. **Explanation:** **Correct Answer: A. Impending rupture of scar** In a patient with a previous cesarean section, the bladder is often densely adherent to the lower uterine segment (LUS) due to postoperative adhesions. As the scar thins out and begins to give way (impending rupture), the stretching and shearing forces are transmitted to the posterior wall of the bladder. This leads to mucosal congestion and capillary rupture, manifesting as **hematuria**. In the context of a scarred uterus, hematuria is considered a "warning sign" of uterine dehiscence or rupture and warrants immediate evaluation. **Analysis of Incorrect Options:** * **B. Urethral trauma:** While trauma can cause hematuria, it usually occurs during instrumental delivery (forceps/vacuum) or difficult catheterization, rather than as a spontaneous sign during the course of labor. * **C. Prolonged labor:** Prolonged labor may lead to the formation of a Bandl’s ring or pressure necrosis (potentially causing fistulas later), but hematuria specifically in a post-CS patient is a classic indicator of scar instability. * **D. Sepsis:** Sepsis presents with systemic signs like fever, tachycardia, and foul-smelling liquor. While it can cause multi-organ dysfunction, it is not a primary cause of isolated hematuria during labor. **NEET-PG High-Yield Pearls:** * **Scar Rupture Signs:** The most common sign of uterine rupture is an **abnormal FHR pattern** (usually fetal bradycardia). Other signs include loss of station of the presenting part, cessation of contractions, and maternal tachycardia/shock. * **Scar Tenderness:** Persistent localized tenderness over the lower uterine segment between contractions is a significant clinical sign of impending rupture. * **Management:** If scar rupture is suspected, the immediate step is an emergency laparotomy and delivery of the fetus.

Q: What is the WHO recommended dose of misoprostol in the treatment of postpartum hemorrhage?

800 mcg sublingual. **Explanation:** Postpartum Hemorrhage (PPH) is a leading cause of maternal mortality, and its management follows specific WHO guidelines. While **Oxytocin** (10 IU IV/IM) remains the first-line drug for both prevention and treatment, **Misoprostol** (a Prostaglandin E1 analogue) is a critical alternative, especially in low-resource settings. **Why Option C is correct:** According to the WHO recommendations for the **treatment** of PPH, the recommended dose of Misoprostol is **800 mcg sublingual**. The sublingual route is preferred for treatment because it achieves the highest peak plasma concentration and the fastest onset of action (approximately 11 minutes), which is vital in an emergency hemorrhagic state. **Analysis of Incorrect Options:** * **A & B (400 mcg / 600 mcg):** These doses are used for the **prevention** (prophylaxis) of PPH, not treatment. The WHO recommends 600 mcg orally for prevention in settings where oxytocin is unavailable. * **D (1000 mcg):** While older protocols occasionally mentioned higher doses (often rectal), current WHO guidelines cap the therapeutic dose at 800 mcg to balance efficacy against side effects like shivering and pyrexia. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC) for PPH Prophylaxis:** Oxytocin (10 IU IM/IV). * **DOC for PPH Treatment:** Oxytocin (IV infusion) + Ergometrine (if no hypertension) or Carboprost (PGF2α). * **Misoprostol Side Effects:** Shivering and transient fever (pyrexia) are very common. * **Contraindication:** Avoid Ergometrine and Carboprost in patients with hypertension and asthma, respectively. Misoprostol is generally safe in these conditions.

Q: Which is the longest fetal diameter?

Mentovertical. **Explanation:** The fetal skull diameters are categorized into longitudinal and transverse diameters. The **Mentovertical (MV)** diameter is the longest diameter of the fetal head, measuring approximately **13.5 cm**. It extends from the midpoint of the chin (mentum) to the highest point on the sagittal suture (vertex). This diameter presents in a **Brow presentation**, which is clinically significant because it exceeds the average diameters of the maternal pelvic inlet, typically making vaginal delivery impossible. **Analysis of Incorrect Options:** * **Biparietal (9.5 cm):** This is a transverse diameter between the two parietal eminences. It is the most important transverse diameter as it represents the widest part of the head to pass through the pelvic inlet in a well-flexed vertex presentation. * **Suboccipitofrontal (10 cm):** This longitudinal diameter extends from the undersurface of the occipital bone to the prominence of the forehead. it is the presenting diameter when the head is partially flexed. * **Occipitofrontal (11.5 cm):** This diameter extends from the occipital protuberance to the root of the nose (glabella). It is the presenting diameter in a **deflexed vertex** (occipito-posterior) position. **NEET-PG High-Yield Pearls:** 1. **Smallest Diameter:** The Suboccipitobregmatic (9.5 cm) is the presenting diameter in a well-flexed vertex presentation. 2. **Mento-Vertical (13.5 cm):** Associated with Brow presentation; usually results in obstructed labor. 3. **Submentobregmatic (9.5 cm):** The presenting diameter in a Face presentation (fully extended head). 4. **Engaging Diameter:** In a normal labor, the Biparietal (transverse) and Suboccipitobregmatic (longitudinal) are the key diameters.

Q: Peak of prostaglandin levels occurs in which stage of labor?

Third stage of labor. **Explanation:** The correct answer is **C. Third stage of labor.** **Underlying Medical Concept:** Prostaglandins (specifically PGF2α and PGE2) play a critical role throughout labor by promoting cervical ripening and stimulating myometrial contractions. However, their concentration follows a progressive increase as labor advances. The **peak levels** are reached during the **third stage of labor** (the period between the birth of the baby and the delivery of the placenta). This surge is essential for the powerful, sustained uterine contractions required for placental separation and, most importantly, for the compression of intramyometrial blood vessels (living ligatures) to prevent postpartum hemorrhage (PPH). **Analysis of Options:** * **A & B (First and Second Stages):** While prostaglandin levels rise significantly during these stages to facilitate cervical dilation and fetal descent, they have not yet reached their maximum physiological concentration. * **D (Before the first stage):** Prostaglandins increase in the weeks leading up to labor (pre-labor) to assist in cervical "ripening," but these levels are baseline compared to the active labor process. **NEET-PG High-Yield Pearls:** * **PGF2α Metabolite:** In clinical studies, the levels of *15-keto-13,14-dihydro-PGF2α* (the primary metabolite) are used to measure prostaglandin activity; these levels are highest immediately after delivery. * **Clinical Application:** This physiological peak is the reason why prostaglandin analogues (like Carboprost or Misoprostol) are highly effective in managing atonic PPH. * **Amniotic Fluid:** Prostaglandin concentration in the amniotic fluid also increases progressively, reaching its maximum at the end of the second stage and during the third stage.

Q: Which of the following is not a parameter in Bishop's score?

Position of head. The **Bishop Score** (also known as the Pelvic Score) is a clinical tool used to predict the likelihood of a successful vaginal delivery following the induction of labor. It assesses the "ripeness" of the cervix based on five specific physical parameters. ### Why "Position of Head" is the Correct Answer The Bishop score evaluates the **Position of the Cervix** (Posterior, Mid-position, or Anterior), not the position of the fetal head (such as Occipito-Anterior or Occipito-Posterior). While the *station* of the head is included, its rotational position is not a component of this scoring system. ### Analysis of Incorrect Options * **A. Cervical consistency:** This is a core parameter. It is graded as Firm (0), Medium (1), or Soft (2). A softer cervix is more favorable for induction. * **B. Station of head:** This measures the descent of the fetal presenting part relative to the ischial spines. It is scored from -3 (0 points) to +1/+2 (3 points). * **D. Cervical length (Effacement):** This measures the thinning of the cervix. It can be recorded as length in centimeters (0, 1-2, >2) or as a percentage of effacement. ### High-Yield Clinical Pearls for NEET-PG * **Mnemonic to remember parameters:** **"S-P-A-C-E"** (Station, Position of cervix, Apposition/Consistency, Cervical Effacement, Effacement/Dilatation). * **Interpretation:** * **Score ≥ 8:** Indicates a "ripe" cervix; the probability of a successful vaginal delivery is similar to that of spontaneous labor. * **Score ≤ 6:** Indicates an "unripe" cervix; cervical ripening agents (like PGE2/Dinoprostone) are typically required before induction. * **Modified Bishop Score:** In some clinical settings, cervical length (cm) is used instead of effacement percentage.

Q: According to WHO, what is given to prevent postpartum hemorrhage (PPH) by active management of the third stage of labor?

Intramuscular oxytocin. **Explanation:** The **Active Management of the Third Stage of Labor (AMTSL)** is a globally recognized strategy to reduce the incidence of Postpartum Hemorrhage (PPH), the leading cause of maternal mortality. **Why Option B is Correct:** According to the **WHO recommendations**, **Oxytocin (10 IU, IM or IV)** is the preferred uterotonic agent for preventing PPH. It is the gold standard because it is highly effective, acts within 2–3 minutes, has minimal side effects, and is relatively inexpensive [1]. Intramuscular (IM) administration is often preferred in resource-limited settings as it does not require intravenous access. **Analysis of Incorrect Options:** * **Option A (PGF2 alpha):** Carboprost (a PGF2α analog) is a second-line agent used for *refractory* PPH. It is not used for routine prophylaxis due to significant side effects like bronchospasm and hypertension. * **Option C (IV Ergometrine):** While effective, ergometrine is not the first choice because it can cause severe vasoconstriction and dangerous elevations in blood pressure. It is contraindicated in patients with pre-eclampsia or heart disease. * **Option D (Perorectal Prostaglandins):** Misoprostol (PGE1) is used only when oxytocin is unavailable. While it can be given rectally, the WHO prioritizes injectable oxytocin for its superior efficacy. **High-Yield NEET-PG Pearls:** 1. **Components of AMTSL:** 1) Administration of a uterotonic (Oxytocin is #1), 2) Controlled Cord Traction (CCT), and 3) Uterine massage after delivery of the placenta. 2. **Storage:** Oxytocin requires a cold chain (2–8°C), whereas Misoprostol is heat-stable. 3. **Dose:** 10 IU IM is the standard prophylactic dose immediately after the delivery of the fetus [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Endocrine System, pp. 1077-1079.

Question 1

Prolonged latent phase of labor is commonly seen in which of the following conditions?

Accepted Answer

Unripe cervix

Answer

Placenta previa

Answer

Abruptio placenta

Answer

Excessive sedation

Question 2

Prelabour pains are mediated through which spinal nerve roots?

Accepted Answer

T10-T12

Answer

T12-L3

Answer

S1-S3

Answer

L3-L4

Question 3

Which of the following is a contraindication for the use of ergometrine?

Accepted Answer

Heart disease

Answer

Diabetes mellitus

Answer

Excessive post-partum hemorrhage

Answer

Anaemia

Question 4

Which of the following drugs is not used for induction of labor?

Accepted Answer

Betamethasone

Answer

Prostaglandin E2 (PGE2)

Answer

Prostaglandin E1 (PGE1)

Answer

Mifepristone

Question 5

Hematuria during labor in a patient with a previous cesarean section is a sign of:

Accepted Answer

Impending rupture of scar

Answer

Urethral trauma

Answer

Prolonged labor

Answer

Sepsis

Question 6

What is the WHO recommended dose of misoprostol in the treatment of postpartum hemorrhage?

Accepted Answer

800 mcg sublingual

Answer

400 mcg oral

Answer

600 mcg sublingual

Answer

1000 mcg oral

Question 7

Which is the longest fetal diameter?

Accepted Answer

Mentovertical

Answer

Biparietal

Answer

Suboccipitofrontal

Answer

Occipitofrontal

Question 8

Peak of prostaglandin levels occurs in which stage of labor?

Accepted Answer

Third stage of labor

Answer

First stage of labor

Answer

Second stage of labor

Answer

Before the first stage of labor

Question 9

Which of the following is not a parameter in Bishop's score?

Accepted Answer

Position of head

Answer

Cervical consistency

Answer

Station of head

Answer

Cervical length

Question 10

According to WHO, what is given to prevent postpartum hemorrhage (PPH) by active management of the third stage of labor?

Accepted Answer

Intramuscular oxytocin

Answer

Intravenous PGF2 alpha agonist

Answer

Intravenous ergometrine

Answer

Perorectal prostaglandins

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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