Labor and Delivery Practice Questions

Q: Which of the following statements is false regarding the cardinal movements during breech delivery?

The back of the fetus is directed posteriorly.. In breech delivery, the cardinal movements follow a specific sequence to navigate the maternal pelvis. **Explanation of the Correct Answer (B):** This statement is **false** because, for a successful vaginal breech delivery, the **fetal back must be directed anteriorly** (towards the maternal symphysis pubis). If the back rotates posteriorly (Sacrum Posterior), the fetal chin can become hooked behind the symphysis pubis, leading to a "star-gazing" head and making delivery of the after-coming head nearly impossible without significant trauma or entrapment. **Analysis of Other Options:** * **Option A:** The fetal head is born by **flexion**. As the head reaches the pelvic floor, the chin is tucked against the chest, and the head is delivered by maintaining this flexion (often assisted by the Burns-Marshall or Mauriceau-Smellie-Veit maneuver). * **Option C:** During descent, the **anterior hip** usually meets the resistance of the pelvic floor first and descends more rapidly than the posterior hip to undergo internal rotation. * **Option D:** The **bitrochanteric diameter** (10 cm) typically enters the pelvic inlet in one of the **oblique diameters**. **NEET-PG High-Yield Pearls:** * **Bitrochanteric diameter:** The engaging diameter in breech (10 cm). * **Maneuvers for After-coming Head:** * *Mauriceau-Smellie-Veit:* Best for maintaining flexion. * *Burns-Marshall:* Fetus is allowed to hang to use gravity for flexion. * *Piper Forceps:* The preferred forceps for the after-coming head. * **Løvset Maneuver:** Used for the delivery of extended arms. * **Prerequisite for Vaginal Breech:** The head must be flexed (diagnosed via USG) to avoid "Star-gazing fetus" (extended head).

Q: The provided diagram depicts which of the following?

Bakri balloon. ***Bakri balloon*** - A **uterine tamponade balloon** designed specifically for **postpartum hemorrhage** control, featuring a distinctive silicone balloon that inflates within the uterine cavity. - The diagram shows its characteristic **dual-lumen catheter** with inflation port and drainage channel, distinguishing it from other balloon devices. *Intra-amniotic saline instillation* - This procedure involves injecting **saline into the amniotic cavity** during pregnancy for diagnostic purposes like **oligohydramnios** evaluation. - Would not show a **balloon catheter device** but rather a thin needle or catheter for fluid instillation. *Sengstaken-Blakemore tube* - A **triple-lumen tube** with **gastric and esophageal balloons** used specifically for **esophageal varices** bleeding control in the GI tract. - Has a distinctive **longer tube design** with multiple balloons, completely different from uterine applications. *Condom catheter* - A **makeshift uterine balloon** created by tying a condom to a catheter, used as an **improvised tamponade device** in resource-limited settings. - Would appear as a **simple condom attached to a catheter**, lacking the sophisticated dual-lumen design of commercial devices.

Q: In occipitoposterior presentation, in what percentage of patients can a normal delivery occur?

80%. **Explanation:** In **Occipitoposterior (OP) position**, the fetal occiput is directed towards the maternal sacroiliac joint. While it is considered a malposition, it is important to understand that the majority of these cases undergo **spontaneous long anterior rotation** (135°) during labor to become Occipitoanterior (OA). **Why 80% is correct:** Statistically, in approximately **90%** of cases, the head rotates anteriorly. Out of the total cases of OP presentation, about **80% to 90%** will result in a successful vaginal delivery (either spontaneous or assisted) because the pelvis is usually adequate and the rotation occurs successfully. Only about 5–10% remain as persistent OP (leading to face-to-pubis delivery) and another 5% result in deep transverse arrest. **Why other options are incorrect:** * **A & B (10% & 20%):** These figures are far too low. They likely represent the percentage of cases that *fail* to rotate or require a Cesarean section, rather than the total successful deliveries. * **C (50%):** While OP labor is often prolonged and associated with more interventions, a 50% failure rate is clinically inaccurate; the vast majority still deliver vaginally. **High-Yield Clinical Pearls for NEET-PG:** 1. **Most common outcome:** Long anterior rotation (135°) to Occipitoanterior. 2. **Persistent OP:** Occurs when the head fails to rotate; it delivers as **"Face-to-Pubis"** using the root of the nose (glabella) as the fulcrum. 3. **Clinical Sign:** Maternal "backache labor" and early urge to push (due to pressure on the sacrum). 4. **Deflexed Head:** The engaging diameter in OP is the **Suboccipito-frontal (10 cm)** or Occipito-frontal (11.5 cm), which is larger than the Suboccipitobregmatic (9.5 cm) seen in OA.

Q: What is the average duration of the first stage of labor in a primigravida?

12 hours. **Explanation:** The **first stage of labor** begins with the onset of true labor pains and ends with the full dilation of the cervix (10 cm). In a **primigravida** (a woman pregnant for the first time), the average duration of this stage is approximately **12 hours**. **Why 12 hours is correct:** The first stage is divided into the latent phase and the active phase. In primigravidae, the cervix undergoes effacement and dilation more slowly than in multiparae because the soft tissues and pelvic floor have not been previously stretched. According to standard obstetric textbooks (like Williams and Dutta), the average duration is 12 hours, though it can range from 8 to 18 hours. **Analysis of Incorrect Options:** * **A. 6 hours:** This is the average duration of the first stage in a **multigravida**. Multiparous women progress faster due to decreased cervical resistance. * **C & D. 16–18 hours:** While these durations may fall within the upper limit of "normal," they represent the maximum threshold before labor is considered prolonged. They do not represent the *average* duration. **High-Yield Clinical Pearls for NEET-PG:** * **Duration of Second Stage:** Average 2 hours in primigravida; 1 hour in multigravida. * **Duration of Third Stage:** Approximately 15–30 minutes in both (reduced to 5 minutes with Active Management of Third Stage of Labor - AMTSL). * **Friedman’s Curve:** Traditionally used to track progress; however, modern **WHO Labor Care Guides** emphasize that the active phase starts at **5 cm** dilation (previously 4 cm). * **Rate of Dilation:** In the active phase, the minimum expected rate of cervical dilation is **1 cm/hr** for primigravidae.

Q: On which of the following structures is the B Lynch brace suture applied?

Uterus. **Explanation:** The **B-Lynch suture**, also known as the "brace suture," is a life-saving surgical technique used primarily in the management of **Postpartum Hemorrhage (PPH)** caused by **uterine atony**. **1. Why the Uterus is Correct:** The procedure involves applying a continuous suture that wraps around the uterus (similar to a pair of suspenders or braces). The primary mechanism is to provide **mechanical compression** of the uterine corpus. By compressing the anterior and posterior walls of the uterus together, it collapses the uterine cavity and constricts the spiral arteries, thereby stopping the bleeding when the uterus fails to contract on its own. **2. Why Other Options are Incorrect:** * **Cervix:** While cervical tears can cause PPH, the B-Lynch is a fundal compression suture and does not involve the cervix. Cervical issues are managed via repair or cerclage. * **Ovaries & Fallopian Tubes:** These are adnexal structures. Applying a compression suture here would not stop uterine bleeding and could cause unnecessary ischemia or damage to reproductive organs. **NEET-PG High-Yield Pearls:** * **Indication:** Used when medical management (oxytocin, carboprost, misoprostol) fails to control atonic PPH. * **Prerequisite:** A "test of success" is performed by manually compressing the uterus; if bleeding stops with manual compression, the B-Lynch suture is likely to be effective. * **Suture Material:** Usually performed using a heavy, absorbable suture (e.g., **No. 2 Chromic Catgut** or **Vicryl**) with a large needle. * **Other Compression Sutures:** Cho suture (multiple square sutures), Hayman suture (modified B-Lynch that doesn't require opening the lower segment), and Pereira suture.

Q: A primigravida at 37 weeks of gestation presents with central placenta previa and heavy vaginal bleeding. The fetal heart rate is normal. What is the best management option for this patient?

Cesarean section. **Explanation:** The management of placenta previa is guided by the degree of placenta encroachment on the internal os and the clinical stability of the mother and fetus. **Why Option B is Correct:** In **central (Type IV/Total) placenta previa**, the placenta completely covers the internal cervical os. Vaginal delivery is physically impossible because the placenta precedes the fetus; any cervical dilation will cause massive, life-threatening maternal hemorrhage. Furthermore, the patient is at **37 weeks (term)** and presenting with **heavy bleeding**. At term, the goal is delivery. Even if the fetal heart rate is currently normal, the severity of the bleeding in a central previa necessitates an immediate **Cesarean section** to save the mother and the fetus. **Why Other Options are Incorrect:** * **Option A:** Expectant management (Macafee-Johnson protocol) is only indicated if the fetus is preterm (<37 weeks), the bleeding is mild/settled, and there is no fetal distress. This patient is at term with heavy bleeding. * **Options C & D:** Induction of labor and vaginal delivery are contraindicated in central placenta previa. Attempting vaginal delivery would lead to catastrophic hemorrhage. Vaginal delivery is only considered in low-lying placenta (Type I) or some cases of marginal previa (Type II anterior) where the head can compress the placental edge. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Transvaginal Ultrasound (TVS) is safer and more accurate than transabdominal ultrasound for locating the placenta. * **Vaginal Examination:** A "per-vaginal" (PV) examination is **strictly contraindicated** in suspected placenta previa (can cause torrential hemorrhage) unless performed as a "Double Setup Examination" in the OT. * **Stallworthy’s Sign:** A drop in fetal heart rate when the head is pressed into the pelvis, seen in posterior placenta previa.

Q: What is the risk of uterine rupture in a classical cesarean section?

4%-9%. The risk of uterine rupture is a critical consideration in obstetric management, particularly when planning a Trial of Labor After Cesarean (TOLAC). ### **Explanation of the Correct Answer** The correct answer is **4%–9%**. A classical cesarean section involves a vertical incision made in the upper segment (contractile part) of the uterus. Unlike the lower segment, the upper segment is thick, highly vascular, and undergoes active contractions during labor. Because this area does not form a thin, passive scar, the integrity of the uterine wall is significantly compromised. The risk of rupture is not only higher but can also occur **before the onset of labor** (pre-labor rupture), necessitating elective repeat cesarean delivery at 36–37 weeks. ### **Analysis of Incorrect Options** * **0%–1.5% (Option A):** This represents the risk associated with a **Lower Segment Cesarean Section (LSCS)**, which is approximately 0.7%–0.9%. * **1.5%–4% (Option B):** This range is typically associated with a **low vertical incision** (not classical) or a history of two prior LSCS. * **10%–12% (Option C):** This is an overestimation for a single classical scar, though risks may approach this level in cases of extensive fundal surgery or multiple classical incisions. ### **NEET-PG High-Yield Pearls** * **Highest Risk:** Classical incisions have the highest risk of rupture among all uterine scars. * **Timing:** Rupture of a classical scar often occurs in the **third trimester**, even without labor. LSCS scars usually rupture **during labor**. * **Management:** TOLAC is **contraindicated** in patients with a history of classical CS, T-shaped incisions, or extensive transfundal uterine surgery (e.g., myomectomy entering the cavity). * **Incision Type:** The "inverted T" incision also carries a high risk (4%–9%), similar to the classical incision.

Question 1

Which of the following statements is false regarding the cardinal movements during breech delivery?

Accepted Answer

The back of the fetus is directed posteriorly.

Answer

Fetal head is born by flexion.

Answer

The anterior hip usually descends more rapidly than the posterior hip.

Answer

Engagement and descent usually occur with the bitrochanteric diameter in the oblique plane.

Question 2

The provided diagram depicts which of the following?

Accepted Answer

Bakri balloon

Answer

Intra-amniotic saline instillation

Answer

Sengstaken-Blakemore tube

Answer

Condom catheter

Question 3

In occipitoposterior presentation, in what percentage of patients can a normal delivery occur?

Accepted Answer

80%

Answer

10%

Answer

20%

Answer

50%

Question 4

What is the average duration of the first stage of labor in a primigravida?

Accepted Answer

12 hours

Answer

6 hours

Answer

16 hours

Answer

18 hours

Question 5

A woman with a previous Lower segment cesarean section will require an elective repeat cesarean section in all of the following conditions, EXCEPT?

Accepted Answer

Occipito-posterior position.

Answer

Transverse lie.

Answer

Breech presentation.

Answer

Mid pelvic contraction.

Question 6

A 32-year-old G2P1 woman at 34 weeks' gestation presents with regular contractions, bloody show, and a gush of fluids. She delivers a 2.3 kg boy spontaneously 1 hour later. Twenty-four hours postpartum, the infant develops irritability, fever, and respiratory distress, diagnosed as sepsis secondary to pneumonia. Which prenatal test would have provided the most useful information in preventing this condition?

Accepted Answer

Rectovaginal Group B Streptococcus culture

Answer

Cervical Chlamydia culture

Answer

Cervical gonorrhea culture

Answer

Elisa for HIV

Question 7

On which of the following structures is the B Lynch brace suture applied?

Accepted Answer

Uterus

Answer

Cervix

Answer

Ovaries

Answer

Fallopian tubes

Question 8

A primigravida at 37 weeks of gestation presents with central placenta previa and heavy vaginal bleeding. The fetal heart rate is normal. What is the best management option for this patient?

Accepted Answer

Cesarean section

Answer

Expectant management

Answer

Induction and vaginal delivery

Answer

Induction and forceps delivery

Question 9

What is the risk of uterine rupture in a classical cesarean section?

Accepted Answer

4%-9%

Answer

0%-1.5%

Answer

1.5%-4%

Answer

10%-12%

Question 10

Which of the following statements is NOT related to occipitoposterior presentation?

Accepted Answer

10% of cases are associated with an anthropoid or android pelvis.

Answer

Malrotation of the occiput may cause occipitosacral arrest.

Answer

Incomplete forward rotation of the occiput may cause deep transverse arrest.

Answer

Nonrotation of the occiput may lead to persistent occipitoposterior presentation.

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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