Labor and Delivery Practice Questions

Q: All of the following are used for induction of labour, EXCEPT?

Prostaglandin F2 alpha tablet. **Explanation:** The goal of **Induction of Labour (IOL)** is to initiate uterine contractions and achieve cervical ripening in a pregnant woman who is not in labor. **Why Option A is the Correct Answer:** **Prostaglandin F2 alpha (PGF2α)**, such as Carboprost or Dinoprost, is a potent uterotonic but is **not used for induction of labor**. Its primary clinical application is the management of **Postpartum Hemorrhage (PPH)** and mid-trimester abortions. When used in a viable pregnancy for induction, PGF2α carries a high risk of uterine hyperstimulation, fetal distress, and systemic side effects (like bronchospasm), making it unsafe for this purpose. **Analysis of Incorrect Options:** * **Option B & D (PGE1 / Misoprostol):** Misoprostol is a synthetic PGE1 analogue. It is highly effective for both cervical ripening and induction. It can be administered vaginally, orally, or sublingually (though vaginal/oral are preferred for induction). * **Option C (PGE2 / Dinoprostone):** This is the "gold standard" for induction of labor, especially when the Bishop score is unfavorable. It is available as an intracervical gel or a sustained-release vaginal insert. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice for Induction:** PGE2 (Dinoprostone) is generally preferred over PGE1 due to a lower risk of tachysystole. * **Misoprostol Dose:** For induction at term, the dose is **25 mcg** every 4–6 hours. (Note: 200–800 mcg is used for PPH/Abortion). * **Contraindication:** Prostaglandins are generally avoided for induction in women with a **previous Cesarean section** due to the increased risk of uterine rupture. * **Mechanical Methods:** If pharmacological methods are contraindicated, Foley’s catheter bulb or ARM (Artificial Rupture of Membranes) can be used.

Q: Deep transverse arrest is seen in which fetal head presentation?

Occipito-posterior position. Deep transverse arrest is a classic complication of the **Occipito-posterior (OP)** position, specifically during the mechanism of labor known as "long rotation." ### 1. Why Occipito-posterior is Correct In a persistent OP position, the fetal head must rotate **135° anteriorly** to reach the symphysis pubis. If there is a failure of rotation due to weak uterine contractions or a flat (platypelloid/android) pelvis, the head may get arrested midway at the level of the ischial spines. At this point, the sagittal suture lies in the **transverse diameter** of the pelvic outlet. Because the bi-parietal diameter is caught between the ischial spines, further descent is impossible, leading to **Deep Transverse Arrest**. ### 2. Why Other Options are Incorrect * **Occipito-anterior (OA):** This is the normal position. The head only needs to rotate 45° to be delivered; there is no "long rotation" required, so arrest in the transverse diameter does not occur. * **Breech delivery:** The presenting part is the buttocks/feet, not the vertex. While "arrest of the after-coming head" can occur, "deep transverse arrest" is a specific term reserved for vertex presentations. * **Face presentation:** Arrest here usually occurs in the **Mento-posterior** position (where the chin is towards the sacrum), as the neck cannot extend further to negotiate the pelvic curve. ### 3. NEET-PG High-Yield Pearls * **Prerequisites for DTA:** The head must be at the level of the **ischial spines** (Station 0), and the sagittal suture must be in the **transverse diameter**. * **Management:** If the pelvis is adequate, rotation and extraction via **Kielland’s Forceps** or Ventouse can be attempted; otherwise, a **Cesarean Section** is indicated. * **Associated Pelvis:** Deep transverse arrest is most commonly associated with **Android** and **Platypelloid** pelvises.

Q: What is the preferred tocolytic agent for a patient with cardiac disease?

Atosiban. **Explanation:** The goal of tocolysis is to delay delivery for 48 hours to allow for corticosteroid administration. In a patient with cardiac disease, the choice of tocolytic is governed by the drug's side-effect profile, specifically its impact on hemodynamics and fluid balance. **Why Atosiban is the Correct Answer:** Atosiban is a selective **Oxytocin Receptor Antagonist (ORA)**. It works by competitively inhibiting oxytocin receptors in the myometrium. Its primary advantage is its **high organ specificity**; it has negligible effects on the cardiovascular, respiratory, or renal systems. Because it does not cause tachycardia, hypotension, or fluid retention, it is the safest and preferred tocolytic for patients with cardiac disease or those at risk of pulmonary edema. **Analysis of Incorrect Options:** * **Isoxsuprine:** A Beta-2 agonist. These are contraindicated in cardiac disease as they cause significant maternal tachycardia, palpitations, hypotension, and increase the risk of pulmonary edema. * **Nifedipine:** A Calcium Channel Blocker (CCB). While often the first-line tocolytic for healthy patients, it causes peripheral vasodilation and reflex tachycardia, which can destabilize a patient with underlying cardiac pathology. * **Magnesium Sulfate:** Primarily used for neuroprotection. As a tocolytic, it requires high doses that can cause cardiac depression and fluid overload, making it less ideal than Atosiban in cardiac cases. **High-Yield NEET-PG Pearls:** * **Drug of Choice (DOC) for Tocolysis (General):** Nifedipine (due to oral route and efficacy). * **DOC for Tocolysis in Diabetes:** Nifedipine (Beta-agonists cause hyperglycemia). * **DOC for Tocolysis in Cardiac Disease/Multiple Pregnancy:** Atosiban. * **Contraindication for Magnesium Sulfate:** Myasthenia Gravis. * **Contraindication for Indomethacin:** Gestational age >32 weeks (risk of premature closure of Ductus Arteriosus).

Q: Head delivery by flexion occurs in which presentation?

Face presentation. In normal labor (Occiput Anterior), the head is born by **extension**. However, in a **Face presentation**, the mechanism of delivery is reversed. ### **Explanation of the Correct Answer** In a face presentation, the head is already in a state of complete hyperextension. For delivery to occur, the **mentum (chin)** must rotate anteriorly to lie behind the symphysis pubis. Once the chin is pivoted under the pubic symphysis, the head is delivered by **flexion**. As the head flexes, the nose, forehead, vertex, and finally the occiput pass over the perineum. *Note: If the mentum is posterior (Mentoposterior), the head is further extended and cannot be delivered vaginally.* ### **Why Other Options are Incorrect** * **Occiput Anterior (OA):** This is the most common presentation. The head is born by **extension** as the occiput pivots under the pubic symphysis. * **Occiput Posterior (OP):** If delivered vaginally as a persistent OP, the head is born by **increased flexion** (if the forehead pivots under the symphysis) or a combination of flexion and extension. However, it is not the classic "delivery by flexion" model like face presentation. * **Brow Presentation:** This is an unstable presentation. The engaging diameter (Mentovertical, 13.5 cm) is too large for the pelvic brim. Unless it converts to a face or vertex presentation, a persistent brow presentation **cannot be delivered vaginally**. ### **High-Yield Clinical Pearls for NEET-PG** * **Mnemonic:** Face = Flexion (F-F). Vertex = Extension. * **Engaging Diameter in Face:** Submentobregmatic (9.5 cm). * **Prerequisite for Vaginal Delivery:** Only **Mento-anterior** positions can deliver vaginally. Mento-posterior positions result in obstructed labor. * **Common Association:** Anencephaly is a frequent cause of face presentation.

Q: A primigravida presents with 6 cm cervical dilatation and contractions occurring at a rate of 3 per 10 minutes. Which stage of labor is she in?

First stage. **Explanation:** The correct answer is **A. First stage**. Labor is clinically divided into four distinct stages based on the progression of cervical changes and the delivery of the fetus and placenta. 1. **First Stage (Stage of Cervical Dilatation):** This stage begins with the onset of true labor pains and ends with **full cervical dilatation (10 cm)**. It is further divided into the Latent phase and the Active phase. Since the patient in the question has **6 cm dilatation**, she is in the active phase of the first stage of labor. 2. **Second Stage (Stage of Expulsion):** This stage begins from full cervical dilatation (10 cm) and ends with the **delivery of the fetus**. 3. **Third Stage:** This stage begins after the delivery of the fetus and ends with the **expulsion of the placenta and membranes**. 4. **Fourth Stage:** This is the clinical observation period (usually 1–2 hours) immediately following the delivery of the placenta to monitor for postpartum hemorrhage (PPH). **High-Yield NEET-PG Pearls:** * **Friedman’s Curve:** Traditionally used to track the first stage of labor. * **Active Phase:** According to recent WHO guidelines (Labor Care Guide), the active phase of the first stage starts at **5 cm** dilatation (previously 4 cm). * **Duration:** In primigravida, the first stage lasts approximately 12 hours, while the second stage lasts about 2 hours (without epidural). * **Contractions:** Adequate labor is generally defined as 3–4 contractions every 10 minutes, each lasting 40–45 seconds.

Q: Which of the following is NOT a benefit of surgical induction of labor?

Decreased incidence of amnionitis. **Explanation:** Surgical induction of labor, primarily through **Artificial Rupture of Membranes (ARM) or Amniotomy**, is a common obstetric procedure. The correct answer is **C** because amniotomy actually **increases** the risk of infection (amnionitis/chorioamnionitis) rather than decreasing it. Once the protective amniotic sac is breached, the barrier against vaginal flora is lost, and the risk of ascending infection rises proportionally with the duration of the rupture-to-delivery interval. **Analysis of Options:** * **A. Enhances progress of active labor:** Amniotomy releases endogenous prostaglandins and allows the fetal head to apply directly to the cervix, which stimulates uterine contractions and shortens the duration of labor. * **B. Relieves maternal distress in hydramnios:** In cases of severe polyhydramnios, the overdistended uterus causes maternal respiratory discomfort. Controlled ARM reduces intrauterine pressure, providing immediate symptomatic relief. * **D. Reduces the need for cesarean section:** By accelerating labor and correcting certain types of dystocia, surgical induction can prevent prolonged labor, thereby potentially reducing the necessity for a cesarean delivery. **NEET-PG High-Yield Pearls:** * **Prerequisites for ARM:** The fetal head must be **engaged** (to prevent cord prolapse) and the cervix should be favorable. * **Complications of ARM:** Umbilical cord prolapse (most immediate danger), accidental fetal injury, and increased risk of maternal/fetal infection. * **Amniotomy in Abruptio Placentae:** It is the treatment of choice as it reduces intrauterine pressure, which decreases the entry of thromboplastin into maternal circulation, helping to prevent DIC.

Q: What is the pH value in capillary scalp blood that indicates serious fetal distress requiring emergency intervention?

7.25**. * **pH 7.20 – 7.25:** Classified as "Pre-pathological" or "Borderline." This requires a repeat sample within 30–60 minutes to monitor the trend. * **pH 7.4):** This represents an alkalotic state, which is not typical of fetal distress. A normal fetal pH is slightly more acidic than adult pH (7.4) due to the CO2 gradient. * **C (> 7.1):** While a pH of 7.15 is indeed distress, the threshold for intervention begins at 7.1 as a cutoff would delay necessary intervention for babies already in the "danger zone" (7.11–7.19). **High-Yield Clinical Pearls for NEET-PG:** * **Contraindications for FBS:** Maternal infections (HIV, Hepatitis, Herpes), fetal bleeding disorders (Hemophilia), and prematurity ( 4.8 mmol/L** is considered abnormal and indicates the need for delivery. * **Positioning:** FBS is performed with the mother in the left lateral position to avoid aortocaval compression.

Q: From what cervical dilatation (in cm) is a partogram plotted at regular intervals?

4 cm. ### Explanation **1. Why 4 cm is the Correct Answer:** The partogram is a graphical representation of labor progress. According to the **World Health Organization (WHO)** and standard obstetric guidelines, the partogram is initiated at the onset of the **Active Phase** of the first stage of labor. Traditionally, the active phase is defined as starting when cervical dilatation reaches **4 cm** in the presence of regular uterine contractions. Plotting at this stage allows for the early identification of labor dystocia (prolonged labor) by monitoring the rate of dilatation against the "Alert" and "Action" lines. **2. Analysis of Incorrect Options:** * **B (5 cm) & C (6 cm):** While recent guidelines (like the WHO Labor Care Guide 2020 and Zhang’s criteria) suggest that the active phase may actually accelerate closer to 5 or 6 cm, the **standard textbook definition** for exam purposes (and the traditional WHO partogram) remains 4 cm. * **D (8 cm):** This represents advanced labor. Plotting this late would defeat the purpose of the partogram, which is to provide an early warning system for deviations from normal labor progress. **3. High-Yield Clinical Pearls for NEET-PG:** * **Components of Partogram:** It monitors three areas: Fetal condition (FHR, membranes, liquor), Labor progress (Dilatation, descent, contractions), and Maternal condition (Pulse, BP, temperature, urine). * **Alert Line:** A diagonal line starting at 4 cm dilatation representing a rate of 1 cm/hour. * **Action Line:** Parallel to the alert line and usually **4 hours** to its right. Crossing this line indicates the need for intervention (e.g., augmentation or C-section). * **Latent Phase:** Defined as 0–3 cm dilatation; it is usually not plotted on the standard WHO partogram to avoid unnecessary early interventions. * **Frequency of PV Examination:** In the active phase, cervical dilatation is typically assessed every **4 hours** unless indicated otherwise.

Question 1

In left oblique breech presentation, in which diameter does the head engage?

Accepted Answer

Right oblique diameter

Answer

Left oblique diameter

Answer

Right transverse diameter

Answer

Left transverse diameter

Question 2

All of the following are used for induction of labour, EXCEPT?

Accepted Answer

Prostaglandin F2 alpha tablet

Answer

Prostaglandin E1 tablet

Answer

Prostaglandin E2 gel

Answer

Misoprostol

Question 3

Deep transverse arrest is seen in which fetal head presentation?

Accepted Answer

Occipito-posterior position

Answer

Occipito-anterior position

Answer

Breech delivery

Answer

Face presentation

Question 4

What is the preferred tocolytic agent for a patient with cardiac disease?

Accepted Answer

Atosiban

Answer

Isoxsuprine

Answer

Nifedipine

Answer

Magnesium sulfate

Question 5

Head delivery by flexion occurs in which presentation?

Accepted Answer

Face presentation

Answer

Brow presentation

Answer

Occiput posterior vertex presentation

Answer

Occiput anterior vertex presentation

Question 6

A primigravida presents with 6 cm cervical dilatation and contractions occurring at a rate of 3 per 10 minutes. Which stage of labor is she in?

Accepted Answer

First stage

Answer

Second stage

Answer

Third stage

Answer

Fourth stage

Question 7

Which of the following is NOT a benefit of surgical induction of labor?

Accepted Answer

Decreased incidence of amnionitis

Answer

Enhances progress of active labor

Answer

Relieves maternal distress in hydramnios

Answer

Reduces the need for cesarean section

Question 8

A 30-year-old G5 P3 A1 presents to the OPD in an exhausted state with labor pains for 12 hours and a history of drainage of liquor 10 hours prior. Examination reveals a pulse of 96/min, a dry and coated tongue, good uterine contractions, and absent fetal heart sounds. Pelvic examination shows a term pregnancy, a thick cervix dilated 6-7 cm, absent membranes, a large caput, and a presenting part station of +3. What is the most likely diagnosis?

Accepted Answer

Obstructed labor

Answer

Normal labor findings

Answer

Prolonged labor

Answer

Abnormal uterine action

Question 9

What is the pH value in capillary scalp blood that indicates serious fetal distress requiring emergency intervention?

Accepted Answer

< 7.2

Answer

> 7.4

Answer

> 7.1

Answer

None of the above

Question 10

From what cervical dilatation (in cm) is a partogram plotted at regular intervals?

Accepted Answer

4 cm

Answer

5 cm

Answer

6 cm

Answer

8 cm

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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