Labor and Delivery Practice Questions

Q: A third-degree perineal tear involves which of the following structures?

Anal sphincter. **Explanation:** The classification of perineal tears is a high-yield topic in Obstetrics, based on the depth of anatomical structures involved. A **third-degree tear** is defined by the involvement of the **anal sphincter complex** (External Anal Sphincter and/or Internal Anal Sphincter). **Why the correct answer is right:** * **Anal Sphincter (Option D):** By definition, third-degree tears extend beyond the perineal muscles to involve the anal sphincter. These are further sub-classified into: * **3a:** 50% of EAS thickness. * **3c:** Both EAS and Internal Anal Sphincter (IAS) are torn. **Why the other options are wrong:** * **Vaginal mucosa (Option A):** This is involved in a **first-degree tear**, which is limited to the fourchette, perineal skin, and vaginal mucous membrane. * **Urethral mucosa (Option B):** While periurethral lacerations can occur during delivery, they are not part of the standard grading for perineal tears. * **Levator ani muscle (Option C):** Involvement of the perineal muscles (but not the anal sphincter) characterizes a **second-degree tear**. The levator ani is generally not involved in standard perineal tears; its involvement would indicate a more complex pelvic floor injury. **High-Yield Clinical Pearls for NEET-PG:** * **Fourth-degree tear:** Involves the anal sphincter complex AND the **anal epithelium/rectal mucosa**. * **Suture Material:** Third and fourth-degree tears should be repaired in an OT using long-acting absorbable sutures (e.g., Polyglactin/Vicryl). * **Technique:** The "overlap" or "end-to-end" technique can be used for EAS repair. * **Risk Factors:** Instrumental delivery (Forceps > Ventouse), midline episiotomy, and large fetal birth weight.

Q: Which among the following is a definitive indicator for the start of active labor?

Cervical dilatation greater than 3 cm. **Explanation:** The diagnosis of labor is clinical, but the transition from the **latent phase** to the **active phase** is defined by specific cervical changes. **Why Option B is Correct:** According to Friedman’s criteria and traditional obstetric teaching, the **active phase of labor** begins when the cervix is dilated **more than 3 cm** (typically 4 cm or more) in the presence of regular, painful uterine contractions. During this phase, the rate of cervical dilatation accelerates significantly (at least 1.2 cm/hr in primipara and 1.5 cm/hr in multipara), leading to the eventual full dilatation of the cervix. **Why Other Options are Incorrect:** * **A & C (Rupture of Membranes/Leaking):** While the rupture of membranes (ROM) often occurs during labor, it can happen before labor begins (PROM). It is an event associated with labor but not a definitive diagnostic marker for the active phase. * **D (Show):** "Show" refers to the expulsion of the mucus plug mixed with blood. While it is a sign that labor is imminent (premonitory sign), it can occur days before the actual onset of active labor. **High-Yield Clinical Pearls for NEET-PG:** * **WHO/ACOG Update:** Recent guidelines (ACOG/SMFM) suggest that the threshold for active labor may be shifted to **6 cm** to reduce unnecessary interventions, but for exam purposes, **>3-4 cm** remains the classic benchmark for the start of the active phase. * **Friedman’s Curve:** The active phase consists of the acceleration phase, the phase of maximum slope, and the deceleration phase. * **Latent Phase Duration:** Prolonged latent phase is defined as >20 hours in primigravida and >14 hours in multigravida.

Q: External cephalic version is contraindicated in all of the following conditions except?

Breech presentation. **Explanation:** **External Cephalic Version (ECV)** is a procedure performed to manually convert a malpresentation (usually breech or transverse) into a cephalic presentation by manipulating the fetus through the maternal abdominal wall. **Why "Breech Presentation" is the correct answer:** Breech presentation is the **primary indication** for performing an ECV, not a contraindication. The goal of the procedure is to reduce the incidence of breech vaginal deliveries and Cesarean sections by turning the baby into a head-first position. **Analysis of Contraindications (Incorrect Options):** * **Antepartum Hemorrhage (Option A):** ECV is contraindicated because the manipulation can exacerbate placental abruption or cause further bleeding in cases of placenta previa. * **Multiple Pregnancy (Option B):** There is a high risk of cord entanglement, placental abruption, or premature rupture of membranes. ECV is generally only considered for the second twin *after* the first has been delivered. * **Ruptured Membranes (Option D):** Adequate amniotic fluid is essential to act as a lubricant for the fetus to turn. Once membranes have ruptured (Oligohydramnios), there is no space for rotation, and the risk of cord prolapse or fetal distress increases significantly. **High-Yield Clinical Pearls for NEET-PG:** * **Ideal Timing:** ECV is performed at **≥37 weeks** to minimize the risk of preterm labor and ensure that if an emergency C-section is required, the fetus is term. * **Prerequisites:** Reactive NST (fetal well-being), adequate liquor (AFI >5), and no uterine anomalies. * **Tocolysis:** Use of beta-mimetics (e.g., Terbutaline) increases the success rate by relaxing the uterus. * **Absolute Contraindications:** Placenta previa, previous classical C-section, oligohydramnios, and non-reassuring fetal heart rate.

Q: During delivery, there is a perineal tear involving the anal sphincter but the anal mucosa is not involved. Which degree of tear is this?

Third-degree. ### Explanation Perineal tears are classified based on the anatomical structures involved. The correct answer is **Third-degree** because it specifically involves the **anal sphincter complex** without breaching the anorectal mucosa [1]. #### Anatomical Classification: * **First-degree:** Injury to the perineal skin and/or vaginal mucosa only. No muscle involvement [1]. * **Second-degree:** Injury to the perineal muscles (e.g., bulbocavernosus, superficial transverse perineal muscle) and fascia, but the **anal sphincter remains intact** [1]. * **Third-degree (Correct):** Injury involves the **External Anal Sphincter (EAS)** and/or the **Internal Anal Sphincter (IAS)** [1]. It is further sub-divided (Sultan Classification): * **3a:** 50% of EAS thickness torn. * **3c:** Both EAS and IAS are torn. * **Fourth-degree:** The most severe form, where the tear extends through the anal sphincter complex and involves the **anal mucosa/rectal epithelium**, exposing the anorectal lumen [1]. #### NEET-PG High-Yield Pearls: 1. **Surgical Repair:** Third and fourth-degree tears are termed **Obstetric Anal Sphincter Injuries (OASIS)** and must be repaired in an operating theater under regional or general anesthesia [2]. 2. **Suture Material:** Use long-acting absorbable sutures (e.g., 3-0 PDS or Vicryl) [3]. 3. **Technique:** For EAS repair, either "end-to-end" or "overlap" techniques can be used (overlap is preferred for 3c/4th degree) [3]. 4. **Post-op Care:** Essential to provide **laxatives** (to prevent straining) and prophylactic antibiotics. Avoid rectal exams or suppositories during recovery [3].

Q: A 30-week gestation patient presents with a history of vaginal bleeding and is admitted for evaluation. Fetal heart rate is 130 bpm with normal variability. Ultrasonography reveals a placenta partially covering the internal cervical os. Currently, there is no active vaginal bleeding. What is the best management for this patient?

Resuscitation and observation in a high-risk ward. ### Explanation The patient presents with **Placenta Previa** (partial) at 30 weeks gestation. The management of placenta previa depends on the hemodynamic stability of the mother, the fetal condition, and the gestational age. **Why Option B is Correct:** The primary goal in a preterm patient (30 weeks) who is currently stable with no active bleeding is **expectant management (Macafee and Johnson protocol)**. This approach aims to prolong the pregnancy to achieve fetal maturity while ensuring the patient is in a setting where immediate intervention is possible if bleeding recurs. Observation in a high-risk ward allows for bed rest, monitoring of vitals, and administration of corticosteroids for lung maturity. **Why Other Options are Incorrect:** * **Option A:** Immediate cesarean delivery is indicated only if there is maternal hemodynamic instability, fetal distress, or if the pregnancy has reached 37 weeks. At 30 weeks, delivery should be avoided unless life-threatening bleeding occurs. * **Option C:** Amniocentesis is invasive and unnecessary. Current guidelines favor steroids and expectant management until 36–37 weeks rather than testing for lung maturity. * **Option D:** **Digital vaginal examination is strictly contraindicated** in suspected placenta previa ("No P/V"). It can cause massive, life-threatening hemorrhage by dislodging a clot or piercing the placenta. **NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Transvaginal Ultrasound (TVS) is safer and more accurate than transabdominal ultrasound for locating the placenta. * **Macafee Protocol:** Indicated if gestation is <37 weeks, bleeding is not life-threatening, and the fetus is healthy. * **Steroids:** Administered between 24–34 weeks to reduce the risk of RDS. * **Anti-D:** Must be given to Rh-negative unsensitized mothers following any bleeding episode.

Q: In a breech delivery, the aftercoming head of the baby can be arrested by all of the following mechanisms except?

Placenta previa. In a breech delivery, the "aftercoming head" refers to the fetal head being delivered last. Arrest of the aftercoming head is a critical obstetric emergency. ### Why Placenta Previa is the Correct Answer **Placenta previa** is a condition where the placenta is implanted in the lower uterine segment, obstructing the internal os. This is an absolute contraindication to vaginal delivery. Therefore, a patient with known placenta previa would undergo a **Planned Cesarean Section**. Since a vaginal breech delivery would not be attempted, the clinical scenario of an "arrested aftercoming head" during labor does not occur in this context. ### Explanation of Incorrect Options (Causes of Arrest) * **Extended Head (Option A):** This is the most common cause of arrest. If the head deflexes, larger diameters (mentovertical) attempt to pass through the pelvis instead of the smaller suboccipitobregmatic diameter, leading to obstruction. * **Hydrocephalus (Option B):** Fetal macrocephaly due to excess cerebrospinal fluid makes the head too large to fit through the pelvic brim or the cervix, causing mechanical arrest. * **Incomplete Dilatation of the Cervix (Option D):** Common in preterm breech. The smaller body slips through a partially dilated cervix, but the larger, non-compressible head gets trapped by the cervical rim (spasmodic contraction). ### NEET-PG High-Yield Pearls * **Management:** The **Mauriceau-Smellie-Veit maneuver** is the gold standard for delivering the aftercoming head (promotes flexion). * **Forceps:** **Piper’s forceps** are specifically designed for the aftercoming head. * **Entrapped Head:** If the cervix is the cause of arrest, **Dührssen incisions** (at 2, 6, and 10 o'clock) or a **Zavanelli maneuver** (replacement for C-section) may be considered. * **Burns-Marshall Method:** Used when the head is in the pelvic cavity; involves letting the baby hang to use gravity for flexion.

Q: Battledore placenta is associated with the highest risk of which complication?

Cord avulsion. **Explanation:** **Battledore Placenta** (also known as Marginal Insertion of the Cord) is a placental variation where the umbilical cord is attached at or within 2 cm of the placental margin rather than the center. **Why Cord Avulsion is the Correct Answer:** The primary clinical risk associated with a Battledore placenta occurs during the **third stage of labor**. Because the cord is attached to the thin peripheral edge of the placenta rather than the robust central mass, the attachment site is structurally weaker. When **Controlled Cord Traction (CCT)** is applied to deliver the placenta, the cord is prone to snapping or tearing away from the placental margin. This is known as **cord avulsion**, which can lead to a retained placenta and subsequent postpartum hemorrhage (PPH). **Analysis of Incorrect Options:** * **A. Fetal anomalies:** While abnormal cord insertions (like Velamentous insertion) are sometimes associated with anomalies, Battledore placenta itself is generally considered a benign variation for the fetus in utero. * **C. Uterine inversion:** This is typically caused by excessive fundal pressure or strong traction on a *centrally* attached cord in a relaxed uterus, not specifically linked to marginal insertion. * **D. Single umbilical artery:** This is a vascular anomaly of the cord itself and does not have a direct causal link with the site of placental insertion. **High-Yield Clinical Pearls for NEET-PG:** * **Incidence:** Occurs in approximately 7–9% of singleton pregnancies. * **Velamentous Insertion vs. Battledore:** In Velamentous insertion, the cord inserts into the fetal membranes (risking **Vasa Previa**); in Battledore, it inserts into the placental mass, but at the very edge. * **Management:** If a Battledore placenta is suspected, the clinician should exercise extreme caution during the third stage of labor, using very gentle traction to avoid avulsion.

Question 1

A third-degree perineal tear involves which of the following structures?

Accepted Answer

Anal sphincter

Answer

Vaginal mucosa

Answer

Urethral mucosa

Answer

Levator ani muscle

Question 2

Why is a transverse uterine incision preferred over a vertical incision during surgery?

Accepted Answer

It reduces the risk of uterine rupture in subsequent pregnancies.

Answer

It has a lower risk of postpartum endometritis.

Answer

It facilitates easier fetal delivery.

Answer

It is located in the active segment of the uterus.

Question 3

Which among the following is a definitive indicator for the start of active labor?

Accepted Answer

Cervical dilatation greater than 3 cm

Answer

Rupture of membranes

Answer

Leaking

Answer

Show

Question 4

External cephalic version is contraindicated in all of the following conditions except?

Accepted Answer

Breech presentation

Answer

Antepartum hemorrhage

Answer

Multiple pregnancy

Answer

Ruptured membranes

Question 5

During delivery, there is a perineal tear involving the anal sphincter but the anal mucosa is not involved. Which degree of tear is this?

Accepted Answer

Third-degree

Answer

First-degree

Answer

Second-degree

Answer

Fourth-degree

Question 6

A 30-week gestation patient presents with a history of vaginal bleeding and is admitted for evaluation. Fetal heart rate is 130 bpm with normal variability. Ultrasonography reveals a placenta partially covering the internal cervical os. Currently, there is no active vaginal bleeding. What is the best management for this patient?

Accepted Answer

Resuscitation and observation in a high-risk ward

Answer

Immediate cesarean delivery

Answer

Amniocentesis to assess fetal lung maturity and plan delivery

Answer

Gentle digital cervical examination to assess dilatation and membrane status

Question 7

Induction of labour is indicated in all of the following conditions except?

Accepted Answer

Heart disease

Answer

Diabetes

Answer

Hypertension

Answer

Renal disease

Question 8

In a breech delivery, the aftercoming head of the baby can be arrested by all of the following mechanisms except?

Accepted Answer

Placenta previa

Answer

Extended head

Answer

Hydrocephalus

Answer

Incomplete dilatation of the cervix

Question 9

In accidental hemorrhage, what is the definitive treatment?

Accepted Answer

Simultaneous emptying of the uterus and blood transfusion

Answer

Induction of labor

Answer

Treatment of hypofibrinogenemia followed by blood transfusion

Answer

Wait and watch

Question 10

Battledore placenta is associated with the highest risk of which complication?

Accepted Answer

Cord avulsion

Answer

Fetal anomalies

Answer

Uterine inversion

Answer

Single umbilical artery

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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