Labor and Delivery Practice Questions

Q: In the Bishop score, which of the following components is NOT included?

Interspinal diameter. The **Bishop Score** (also known as the Pelvic Score) is a clinical tool used to assess the "ripeness" of the cervix and predict the likelihood of a successful vaginal delivery following the induction of labor. ### Why "Interspinal Diameter" is the Correct Answer The Bishop score evaluates five specific parameters related to the **cervix** and the **position of the fetus** within the birth canal. **Interspinal diameter** refers to the distance between the ischial spines (part of the pelvic outlet assessment) and is a fixed anatomical measurement of the maternal pelvis. It does not change during the onset of labor and is therefore not a component of the Bishop score. ### Explanation of Incorrect Options The five components of the Bishop score are: * **Dilatation of the cervix (Option B):** Measures how open the cervix is (0 to >5 cm). * **Effacement of the cervix (Option A):** Measures the thinning/shortening of the cervix (0 to >80%). * **Station of the fetal head (Option C):** Measures the descent of the fetal presenting part relative to the ischial spines (-3 to +2). * **Consistency of the cervix:** Categorized as firm, medium, or soft. * **Position of the cervix:** Categorized as posterior, mid-position, or anterior. ### High-Yield Clinical Pearls for NEET-PG * **Mnemonic:** To remember the components, use **"St. Bishop's CPD"** (Station, Consistency, Position, Dilatation, Effacement). * **Scoring:** Each component is scored 0–2 or 0–3, with a maximum total score of **13**. * **Interpretation:** * A score of **≥8** suggests a "ripe" cervix with a high probability of successful induction (similar to spontaneous labor). * A score of **≤6** suggests an "unripe" cervix, often requiring cervical ripening agents (e.g., Dinoprostone/PGE2) before induction. * **Modified Bishop Score:** Often replaces effacement (in %) with **cervical length (in cm)** for easier clinical measurement.

Q: Which of the following is the most probable cause for the deceleration shown below?

Head Compression. ***Head Compression*** - **Early decelerations** show a characteristic **mirror-image pattern** with uterine contractions, caused by fetal head compression during contractions triggering a **vagal reflex**. - These decelerations are **gradual** in onset and recovery, considered **benign**, and do not indicate fetal compromise. *Cord Compression* - Causes **variable decelerations** with **abrupt onset and recovery**, often described as having a **W or V shape** on CTG. - These decelerations are **unpredictable** in timing and do not follow the contraction pattern like early decelerations do. *Fetal Hypoxia* - Results in **late decelerations** due to **uteroplacental insufficiency**, showing gradual onset but **delayed recovery** after contractions end. - **Recurrent late decelerations** are concerning signs that require evaluation in the context of baseline variability and the overall tracing, unlike the benign nature of early decelerations. *Feto-Maternal Hemorrhage* - Typically causes **sinusoidal pattern** on CTG with smooth, undulating baseline resembling a **sine wave**. - Associated with severe fetal anemia and does not produce the **mirror-image deceleration pattern** seen with head compression.

Q: Which of the following is a sign of placental separation in stage III of labor?

Gushing of blood. ### Explanation The third stage of labor begins after the delivery of the fetus and ends with the expulsion of the placenta. Placental separation occurs due to the sudden reduction in uterine size, leading to a shearing force at the decidua-placental interface. **Why Option A is Correct:** As the placenta detaches from the uterine wall, the retroplacental hematoma (formed between the decidua and the placenta) escapes through the cervix. This results in a **sudden gush of blood**, which is one of the classic clinical signs of separation. **Analysis of Incorrect Options:** * **B. Discoid uterus:** Upon separation, the uterus changes from a flat, **discoid shape** to a firm, **globular shape**. It also rises in the abdomen (Schroeder’s sign) because the placenta moves into the lower uterine segment. * **C. Filling of placenta in vagina:** While the placenta eventually enters the vagina, the clinical sign of separation is the **lengthening of the umbilical cord** at the vulva (modified Brandt-Andrews maneuver), indicating the placenta has descended from the uterus. * **D. Increase in blood pressure:** Hemodynamic changes in the third stage are usually minimal unless there is significant postpartum hemorrhage (PPH), which would cause a *decrease* in blood pressure, not an increase. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Signs of Placental Separation:** 1. **Globular shape** of the uterus (most reliable). 2. **Gush of blood.** 3. **Permanent lengthening of the cord** (does not retract when the uterus is pushed up). 4. **Suprapubic bulge** (due to placenta in the lower segment). * **Management:** Active Management of Third Stage of Labor (AMTSL) is the gold standard to prevent PPH, involving prophylactic oxytocin, controlled cord traction (CCT), and uterine massage.

Q: A 32-week pregnant female with preterm contractions was treated with tocolytic agents. She further developed pulmonary edema. Which of the following tocolytic agents is most likely to have caused pulmonary edema in this patient?

Ritodrine. **Explanation:** The correct answer is **Ritodrine**. **1. Why Ritodrine is correct:** Ritodrine is a **Beta-2 adrenergic agonist**. While it works as a tocolytic by relaxing the uterine smooth muscle, it also has significant Beta-1 stimulatory effects. This leads to tachycardia, increased cardiac output, and sodium/water retention. When administered intravenously (especially alongside corticosteroids for fetal lung maturity or large volumes of IV fluids), it can lead to **pulmonary edema**. This occurs due to a combination of fluid overload and increased capillary permeability. **2. Why the other options are incorrect:** * **Nifedipine (Calcium Channel Blocker):** Currently the first-line tocolytic. Its main side effects are hypotension, flushing, and headache. While rare cases of pulmonary edema are reported, it is significantly less common than with Beta-mimetics. * **Indomethacin (NSAID):** Works by inhibiting prostaglandin synthesis. Its primary concerns are fetal (premature closure of the ductus arteriosus and oligohydramnios), not maternal pulmonary edema. * **Atosiban (Oxytocin Receptor Antagonist):** Known for having the fewest maternal side effects. It is highly specific to the uterus and does not typically cause cardiovascular or pulmonary complications. **Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC):** Nifedipine is the current DOC for tocolysis (24–34 weeks). * **Beta-mimetics (Ritodrine/Terbutaline) Contraindications:** Maternal cardiac disease, uncontrolled hyperthyroidism, and uncontrolled diabetes (due to risk of hyperglycemia and hypokalemia). * **Magnesium Sulfate:** Used for neuroprotection (<32 weeks); toxicity presents with loss of knee jerk reflex (first sign) and respiratory depression. * **Atosiban:** Though expensive, it is the safest tocolytic for patients with multiple pregnancies or cardiac comorbidities.

Q: Shoulder dystocia is predominantly seen in which of the following conditions?

Anencephaly. **Explanation:** The correct answer is **Anencephaly**. **Why Anencephaly?** In a normal delivery, the head is the largest part of the fetus. Once the head is born, it dilates the birth canal sufficiently for the shoulders to follow. In **anencephaly**, there is a developmental absence of the cranial vault and brain tissue. Consequently, the head is small and underdeveloped (rudimentary), failing to adequately dilate the cervix and maternal soft tissues. When the broad, well-developed shoulders reach the pelvic inlet, they encounter an undilated birth canal, leading to **shoulder dystocia**. This is a classic "high-yield" paradox where a smaller head leads to more difficult shoulder delivery. **Analysis of Incorrect Options:** * **A. Transverse lie:** This is a malpresentation where the long axis of the fetus is perpendicular to the mother. Delivery is impossible vaginally; therefore, shoulder dystocia (a complication of vaginal delivery) is not the primary concern here. * **B. Hand prolapse:** This often occurs with transverse lie or compound presentation. While it complicates labor, it does not inherently cause the mechanical bony impaction of the shoulders against the pubic symphysis. * **D. Cord around neck:** A nuchal cord may cause fetal distress or failure to descend, but it does not change the diameter of the shoulders or the dilation of the birth canal. **Clinical Pearls for NEET-PG:** * **Definition:** Shoulder dystocia is the failure of the shoulders to deliver after the head, requiring additional maneuvers. * **Most common cause:** Fetal macrosomia (often associated with maternal diabetes). * **The Anencephaly Paradox:** Small head → inadequate cervical/vaginal dilation → shoulder impaction. * **Management:** Remember the **HELPERR** mnemonic (H-Call for Help, E-Episiotomy, L-Legs/McRoberts, P-Suprapubic Pressure, E-Enter/Internal rotation, R-Remove posterior arm, R-Roll the patient).

Q: What percentage of occipitoposterior positions spontaneously convert to the occipitoanterior position and deliver comfortably?

75-80%. **Explanation:** The **Occipitoposterior (OP)** position is the most common malposition encountered during labor. While it occurs in approximately 15–25% of cases at the onset of labor, the majority of these cases undergo **spontaneous long internal rotation** (135°) to the Occipitoanterior (OA) position. **1. Why 75-80% is correct:** During the second stage of labor, as the fetal head reaches the pelvic floor, the resistance of the levator ani muscles promotes rotation. In approximately **75-80%** of cases, the occiput rotates anteriorly to the OA position, leading to a normal vaginal delivery. This is the natural mechanism of labor for OP positions. **2. Why the other options are incorrect:** * **A (3-4%):** This represents the incidence of **Persistent Occipitoposterior (POP)** position—where the head fails to rotate and remains OP at the time of delivery. * **B (15-16%):** This is closer to the initial incidence of OP position at the *onset* of labor, but it does not account for the high rate of subsequent rotation. * **C (20-25%):** This range often describes the incidence of OP in early labor or the percentage of cases that may require operative intervention (vacuum/forceps/CS) due to failure of rotation. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** Rotation occurs through a **long arc of 135°** (compared to 45° in OA). * **Clinical Sign:** On per-vaginal exam, the **anterior fontanelle** (diamond-shaped) is felt behind the symphysis pubis, and the **sagittal suture** is in the oblique diameter. * **Complications:** If rotation fails, it may result in **Deep Transverse Arrest** (rotation stops at 90°) or **Persistent OP** (Face-to-Pubis delivery). * **Management:** If the pelvis is adequate and the head is low, a "Face-to-Pubis" delivery is possible, though it results in a larger diameter (11.5 cm) distending the perineum, increasing the risk of 3rd-degree tears.

Q: In complete breech presentation, what is the typical fetal attitude maintained?

Universal flexion. In a **Complete Breech** (also known as Flexed Breech), the fetus maintains the **Universal Flexion** attitude, which is the normal physiological posture of the fetus in utero. ### Why Option A is Correct In a complete breech, the fetal attitude is characterized by: * **Flexion at the hip joints.** * **Flexion at the knee joints.** This results in the buttocks and the feet both presenting at the internal os. This is most commonly seen in multiparous women. ### Why Other Options are Incorrect * **Option B (Universal extension):** This is not a standard fetal attitude. Extension of the head occurs in face presentations, but universal extension is incompatible with normal vaginal delivery. * **Option C (Flexion at hip, extension at knee):** This describes a **Frank Breech**. This is the most common type of breech presentation (especially in primigravidae) where the legs are extended against the trunk and the feet lie near the face. * **Option D (Extension of hip, flexion of knee):** This describes a **Footling Breech**, where one or both hips are extended, and the foot (or feet) is the presenting part below the level of the buttocks. ### High-Yield NEET-PG Pearls * **Most common breech:** Frank Breech (especially at term). * **Best prognosis for vaginal delivery:** Frank Breech (the buttocks act as a good dilating wedge). * **Highest risk of Cord Prolapse:** Footling Breech (due to the irregular presenting part not filling the lower uterine segment). * **Prerequisite for Breech:** The "Bitrochanteric diameter" (10 cm) is the engaging diameter in breech presentation. * **Management:** External Cephalic Version (ECV) is typically offered at 36 weeks in primigravidae and 37 weeks in multiparae.

Question 1

In the Bishop score, which of the following components is NOT included?

Accepted Answer

Interspinal diameter

Answer

Effacement of the cervix

Answer

Dilatation of the cervix

Answer

Station of the fetal head

Question 2

Which of the following is the most probable cause for the deceleration shown below?

Accepted Answer

Head Compression

Answer

Cord Compression

Answer

Feto-Maternal Hemorrhage

Answer

Fetal Hypoxia

Question 3

Which of the following is a sign of placental separation in stage III of labor?

Accepted Answer

Gushing of blood

Answer

Discoid uterus

Answer

Filling of placenta in vagina

Answer

Increase in blood pressure

Question 4

The usual site of spontaneous rupture of the intact uterus during pregnancy is the:

Accepted Answer

Body of the uterus

Answer

Anterior lower uterine segment

Answer

Posterior lower uterine segment

Answer

Level of internal os

Question 5

A 32-week pregnant female with preterm contractions was treated with tocolytic agents. She further developed pulmonary edema. Which of the following tocolytic agents is most likely to have caused pulmonary edema in this patient?

Accepted Answer

Ritodrine

Answer

Nifedipine

Answer

Indomethacin

Answer

Atosiban

Question 6

Which of the following is true regarding a fetus in transverse presentation?

Accepted Answer

Polyhydramnios is a cause

Answer

It can be caused by abruptio placenta

Answer

It results in hand prolapse in all cases

Answer

Shoulder dystocia is a major threat

Question 7

Shoulder dystocia is predominantly seen in which of the following conditions?

Accepted Answer

Anencephaly

Answer

Transverse lie

Answer

Hand prolapse

Answer

Cord around neck

Question 8

What percentage of occipitoposterior positions spontaneously convert to the occipitoanterior position and deliver comfortably?

Accepted Answer

75-80%

Answer

3-4%

Answer

15-16%

Answer

20-25%

Question 9

In complete breech presentation, what is the typical fetal attitude maintained?

Accepted Answer

Universal flexion

Answer

Universal extension

Answer

Flexion at the hip and extension at the knee

Answer

Extension of the hip and flexion of the knee

Question 10

Which of the following correctly defines Montevideo units for measurement of uterine activity?

Accepted Answer

Uterine pressure (mm of Hg) multiplied by the number of contractions in 10 minutes.

Answer

Uterine pressure (mm of water) multiplied by the number of contractions in 10 minutes.

Answer

Uterine pressure (cm of water) multiplied by the number of contractions in 10 minutes.

Answer

Uterine pressure (cm of H2O) multiplied by the number of contractions in 20 minutes.

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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