Labor and Delivery Practice Questions

Q: What is the ideal management of a 37-week uncomplicated breech pregnancy?

External cephalic version and trial of vaginal delivery. ### Explanation **1. Why Option C is Correct:** The management of a breech presentation at term (37 weeks or beyond) focuses on reducing the risks associated with breech vaginal delivery while avoiding unnecessary surgery. **External Cephalic Version (ECV)** is the preferred initial management for an uncomplicated breech pregnancy at 37 weeks. If successful, it converts the fetus to a cephalic presentation, allowing for a **Trial of Labor After Version (TOLAV)**. ECV has a success rate of approximately 50-60% and significantly reduces the rate of Cesarean Sections (CS). **2. Why Other Options are Incorrect:** * **Option A (Spontaneous Vaginal Delivery):** While possible, a planned vaginal breech delivery is associated with higher perinatal morbidity and mortality compared to cephalic delivery or planned CS (as per the *Term Breech Trial*). It is generally reserved for specific criteria (e.g., frank breech, flexed head) or emergency situations. * **Option B (Elective Cesarean Section):** While many clinicians opt for CS for breech, it is not the "ideal" first step for an *uncomplicated* case at 37 weeks. ECV should be offered first to provide the patient the opportunity for a safer vaginal delivery. **3. Clinical Pearls for NEET-PG:** * **Timing of ECV:** Performed at **37 weeks** in nulliparous women (to allow for spontaneous version before 37 weeks and ensure fetal maturity if labor is induced by the procedure). * **Prerequisites for ECV:** Reactive NST, adequate liquor (AFI >5), and no contraindications (e.g., placenta previa, prior classical CS, or oligohydramnios). * **Tocolysis:** Beta-mimetics (like Ritodrine or Terbutaline) are often used to relax the uterus during ECV to increase success rates. * **Most common type of breech:** Frank breech (extended legs). * **Safety:** The most common complication of ECV is transient fetal bradycardia.

Q: What is the most important component of the Bishop score?

Dilatation. **Explanation:** 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 five components: Cervical Dilatation, Effacement, Consistency, Position, and Fetal Station. **Why Dilatation is the correct answer:** Among the five parameters, **Cervical Dilatation** is considered the most important and objective predictor of successful induction. It carries the highest weightage in clinical decision-making because it represents the most significant physiological change required for the onset of the active phase of labor. Studies have shown that dilatation has the highest correlation with the duration of labor and the probability of achieving a vaginal delivery. **Analysis of Incorrect Options:** * **Effacement:** While a critical indicator of cervical ripening (thinning), it is secondary to dilatation in predicting the immediate success of induction. * **Station:** This refers to the position of the fetal presenting part relative to the ischial spines. While it indicates fetal descent, it is less reflective of cervical readiness than dilatation. * **Position:** This refers to the orientation of the cervix (Posterior, Mid-position, or Anterior). It is the least objective and least significant parameter in the scoring system. **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic to remember components:** **"S**tation, **D**ilatation, **E**ffacement, **P**osition, **C**onsistency" (**SDEPC**). * **Score Interpretation:** A score of **≥8** suggests a high likelihood of successful vaginal delivery (comparable to spontaneous labor). A score of **≤6** indicates an "unripe" cervix, often requiring cervical ripening agents (e.g., Dinoprostone/PGE2). * **Maximum Score:** 13. * **Modified Bishop Score:** Often replaces effacement (percentage) with **cervical length (cm)** for more objective measurement.

Q: Least chances of cord prolapse are seen with which presentation?

Frank breech. **Explanation:** The risk of umbilical cord prolapse is directly proportional to how effectively the presenting part occupies the lower uterine segment and fills the pelvic inlet. If there is a poor "fit" between the presenting part and the cervix, the cord can slip down past the fetus when the membranes rupture. **1. Why Frank Breech is the Correct Answer:** In a **Frank breech** (thighs flexed, legs extended at the knees), the fetal buttocks form a broad, smooth, and firm presenting part. This "bitrochanteric diameter" fits snugly into the lower uterine segment, acting as an effective wedge that prevents the cord from slipping through. The incidence of cord prolapse in frank breech is approximately **0.5%**, which is nearly as low as in cephalic presentations. **2. Analysis of Incorrect Options:** * **Complete Breech (Option B):** Here, both thighs and legs are flexed. The presenting part is irregular and does not fill the cervix as efficiently as a frank breech, leading to a higher risk (approx. **4-5%**). * **Footling Breech (Option C):** One or both feet are the presenting part. This creates significant empty space in the pelvic inlet, allowing the cord to easily prolapse. This carries the highest risk among breeches (approx. **15%**). * **Knee Presentation (Option D):** Similar to footling breech, the knees are narrow and irregular, failing to occlude the cervix and posing a high risk for prolapse. **NEET-PG High-Yield Pearls:** * **Highest risk of cord prolapse:** Transverse lie (especially when membranes rupture). * **Most common cause of cord prolapse:** Prematurity (due to small fetal size). * **Management:** If cord prolapse occurs, the immediate step is to place the patient in the **Trendelenburg or Knee-chest position** and perform an emergency Cesarean section. Manual replacement of the cord is contraindicated.

Q: Mrs. S (G2 L1) presented to the hospital in labor pains. On examination she had 3 uterine contractions of 20 seconds in 10 minutes, cervical dilation 6 cm and HR 145 bpm. What is the stage of labor?

Stage I. ### Explanation The correct answer is **Stage I**. **1. Why Stage I is correct:** Labor is divided into four distinct stages based on physiological milestones. **Stage I (Cervical Stage)** begins with the onset of true labor pains and ends with **full cervical dilation (10 cm)**. In this clinical scenario, Mrs. S has a cervical dilation of **6 cm**. Since she has not yet reached full dilation, she is currently in the **Active Phase of Stage I**. The presence of regular uterine contractions (3 in 10 minutes) further confirms she is in active labor. **2. Why the other options are incorrect:** * **Stage II (Expulsive Stage):** This stage begins from full cervical dilation (10 cm) and ends with the delivery of the fetus. Since the patient is only at 6 cm, she has not entered this stage. * **Stage III (Placental Stage):** This stage begins after the delivery of the fetus and ends with the expulsion of the placenta and membranes. * **Stage IV:** This is the observation period (usually 1–2 hours) immediately following the delivery of the placenta to monitor for postpartum hemorrhage (PPH). **3. NEET-PG High-Yield Pearls:** * **Stage I Phases:** Divided into the **Latent Phase** (0 to <6 cm) and the **Active Phase** (6 cm to 10 cm), according to recent WHO/ACOG guidelines (previously 4 cm was the threshold). * **Friedman’s Curve:** Historically used to track labor progress; however, modern practice uses the **WHO Labor Care Guide**. * **Duration:** In a multigravida (like Mrs. S, G2L1), Stage I is typically shorter (approx. 6–8 hours) compared to a primigravida (approx. 10–12 hours). * **Fetal Heart Rate (FHR):** The normal range is 110–160 bpm. Mrs. S’s HR of 145 bpm is reassuring.

Q: Massive postpartum hemorrhage may warrant all interventions except:

Thermal endometrial ablation. **Explanation:** In the management of massive postpartum hemorrhage (PPH), the primary goal is to achieve rapid hemodynamic stability and arrest bleeding. **Why Thermal Endometrial Ablation is the Correct Answer:** Thermal endometrial ablation is a **contraindication** in the acute management of PPH. It is a procedure used for the elective treatment of chronic heavy menstrual bleeding (menorrhagia) in non-pregnant women. In the context of PPH, the uterus is large, thin-walled, and often contains clots or retained products; using thermal energy in such a state carries a high risk of uterine perforation and visceral injury. Furthermore, it is ineffective against the deep-seated vascular bleeding characteristic of PPH. **Analysis of Incorrect Options:** * **Balloon Tamponade (e.g., Bakri Balloon):** This is a first-line surgical/procedural intervention for uterine atony. It exerts hydrostatic pressure against the uterine wall to compress bleeding vessels. * **Internal Iliac Artery Ligation:** A life-saving surgical step that reduces pelvic arterial pressure by approximately 85%, thereby slowing the hemorrhage. * **Hysterectomy:** This is the **definitive** management for intractable PPH when conservative medical and surgical measures (like compression sutures or devascularization) fail. **Clinical Pearls for NEET-PG:** * **Stepwise Management:** Medical (Oxytocin/Carboprost) → Mechanical (Tamponade) → Surgical (B-Lynch sutures/Devascularization) → Hysterectomy. * **Internal Iliac Ligation:** The ligature is applied to the **anterior division** of the internal iliac artery to preserve blood supply to the posterior pelvic wall. * **Definitive Treatment:** For Morbidly Adherent Placenta (Placenta Accreta/Percreta) causing PPH, the treatment of choice is often a planned or emergency Hysterectomy.

Q: In brow presentation, what is the presenting diameter?

Mentovertical. **Explanation:** In **Brow Presentation**, the fetal head is in a state of **partial extension** (midway between full flexion and full extension). This position causes the **Mentovertical diameter** to engage in the maternal pelvis. 1. **Why Mentovertical is Correct:** The mentovertical diameter extends from the chin (mentum) to the highest point on the vertex. It measures approximately **13.5 cm**, which is the largest longitudinal diameter of the fetal head. Because this diameter exceeds the average dimensions of the pelvic inlet, a persistent brow presentation is typically an undeliverable position (unless the fetus is very small or the pelvis is very large). 2. **Analysis of Incorrect Options:** * **Submentovertical (11.5 cm):** This diameter is seen in **incomplete face** presentations. * **Occipitofrontal (11.5 cm):** This is the presenting diameter in a **deflexed vertex** (military) presentation. * **Suboccipitobregmatic (9.5 cm):** This is the smallest diameter, seen in a **well-flexed vertex** presentation, which is ideal for vaginal delivery. **High-Yield Clinical Pearls for NEET-PG:** * **Largest Diameter:** Mentovertical (13.5 cm) is the largest diameter of the fetal skull. * **Smallest Diameter:** Suboccipitobregmatic (9.5 cm). * **Face Presentation:** The presenting diameter is **Submentobregmatic (9.5 cm)** when the head is fully extended. * **Management:** Most brow presentations are unstable and will either flex into a vertex or extend into a face presentation. If the brow presentation persists, a **Cesarean Section** is usually indicated due to the cephalopelvic disproportion caused by the 13.5 cm diameter.

Q: All of the following indicate fetal distress except:

Fetal scalp blood pH > 7.32. **Explanation:** The assessment of fetal well-being during labor is critical for identifying fetal distress (hypoxia and acidosis). This question requires identifying the parameter that represents a **normal** fetal state rather than a pathological one. **1. Why Option D is correct:** Fetal scalp blood sampling is the gold standard for assessing fetal acid-base status when the heart rate pattern is non-reassuring. A **pH > 7.25 is considered normal**. A pH of > 7.32 indicates a healthy, well-oxygenated fetus. Fetal distress (acidosis) is typically diagnosed when the pH falls below **7.20**. **2. Why the other options indicate fetal distress:** * **Thick (pea-soup) meconium:** While meconium can occur in post-term pregnancies, thick "pea-soup" meconium often indicates fetal gasping due to hypoxia or vagal stimulation from umbilical cord compression. * **Fetal heart rate 100/minute:** The normal fetal heart rate (FHR) range is 110–160 bpm. A baseline FHR 7.25:** Normal (Repeat if FHR persists). * **7.20 – 7.25:** Pre-acidotic (Repeat in 30 minutes). * **< 7.20:** Acidosis (Immediate delivery indicated). * **Most sensitive indicator of fetal well-being:** Presence of good beat-to-beat variability. * **Earliest sign of fetal distress:** Fetal tachycardia (often precedes bradycardia). * **Most specific sign of fetal distress:** Late decelerations on CTG.

Question 1

What is the ideal management of a 37-week uncomplicated breech pregnancy?

Accepted Answer

External cephalic version and trial of vaginal delivery

Answer

Spontaneous vaginal delivery

Answer

Elective cesarean section

Answer

None of the above

Question 2

Which of the following is NOT a feature of uterine contraction in spastic lower segment?

Accepted Answer

Presence of fundal dominance

Answer

There may be reversed polarity

Answer

Inadequate relaxation in between contractions

Answer

Basal tonus is usually raised above the critical level of 20 mm Hg

Question 3

In modern-day obstetrics, what is the most common cause of uterine rupture?

Accepted Answer

Previous lower segment caesarean section scar rupture

Answer

Prolonged labor

Answer

Forceps delivery

Answer

Internal podalic version

Question 4

What is the most important component of the Bishop score?

Accepted Answer

Dilatation

Answer

Position

Answer

Station

Answer

Effacement

Question 5

Least chances of cord prolapse are seen with which presentation?

Accepted Answer

Frank breech

Answer

Complete breech

Answer

Footling breech

Answer

Knee presentation

Question 6

Mrs. S (G2 L1) presented to the hospital in labor pains. On examination she had 3 uterine contractions of 20 seconds in 10 minutes, cervical dilation 6 cm and HR 145 bpm. What is the stage of labor?

Accepted Answer

Stage I

Answer

Stage II

Answer

Stage III

Answer

Stage IV

Question 7

Massive postpartum hemorrhage may warrant all interventions except:

Accepted Answer

Thermal endometrial ablation

Answer

Hysterectomy

Answer

Internal iliac artery ligation

Answer

Balloon tamponade

Question 8

A 37-week primigravida patient presents with uterine contractions for 10 hours. On examination, the cervix is 1 cm dilated and poorly effaced. What is the most appropriate management?

Accepted Answer

Sedation and expectant management

Answer

Cesarean section

Answer

Amniotomy

Answer

Oxytocin drip

Question 9

In brow presentation, what is the presenting diameter?

Accepted Answer

Mentovertical

Answer

Submentovertical

Answer

Occipitofrontal

Answer

Suboccipitobregmatic

Question 10

All of the following indicate fetal distress except:

Accepted Answer

Fetal scalp blood pH > 7.32

Answer

Thick (pea-soup) meconium

Answer

Fetal heart rate 100/minute

Answer

Loss of beat-to-beat variation

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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