Labor and Delivery Practice Questions

Q: All of the following are causes of Disseminated Intravascular Coagulation (DIC), except?

Multiple pregnancy. **Explanation:** Disseminated Intravascular Coagulation (DIC) in obstetrics is a secondary pathological process triggered by the entry of procoagulant substances (like thromboplastin) into the maternal circulation, leading to widespread activation of the clotting cascade and subsequent consumption of clotting factors. **Why Multiple Pregnancy is the correct answer:** Multiple pregnancy, by itself, is a physiological state and not a trigger for DIC. While it increases the risk for complications like Postpartum Hemorrhage (PPH) or Pre-eclampsia, it does not involve the release of thromboplastin into the circulation unless one of those secondary complications occurs. **Why the other options are causes of DIC:** * **Abruptio Placentae:** This is the **most common cause** of DIC in pregnancy. Retroplacental clots release massive amounts of tissue thromboplastin into the maternal venous sinuses. * **Intrauterine Death (IUD) & Missed Abortion:** If a dead fetus is retained for more than 3–4 weeks, the autolysis of fetal tissues and the placenta releases thromboplastin into the maternal circulation, leading to "Dead Fetus Syndrome" and consumption coagulopathy. **NEET-PG High-Yield Pearls:** 1. **Most common cause of DIC in pregnancy:** Abruptio Placentae. 2. **Most common cause of DIC in clinical practice (overall):** Sepsis. 3. **Amniotic Fluid Embolism:** A rare but catastrophic cause of sudden, severe DIC due to the high concentration of procoagulants in amniotic fluid. 4. **Diagnosis:** Look for decreased Fibrinogen (<150 mg/dL), increased D-dimer/FDPs, and prolonged PT/APTT. 5. **Management:** The definitive treatment is the delivery of the fetus and placenta to remove the source of thromboplastin. Blood products (FFP, Cryoprecipitate, Platelets) are used for stabilization.

Q: Which of the following is the most favorable breech presentation?

Extended breech. **Explanation:** In breech presentation, the **Extended Breech (Frank Breech)** is considered the most favorable for a vaginal delivery. In this position, the thighs are flexed at the hips and the legs are extended at the knees (feet near the face). **Why Extended Breech is the most favorable:** The primary reason is the **"wedge effect."** The buttocks and the extended legs together form a continuous, broad, and firm conical mass that effectively dilates the cervix. This ensures that the cervix is sufficiently dilated to allow the passage of the after-coming head, significantly reducing the risk of **cord prolapse** (0.5% risk) compared to other breech types. **Analysis of Incorrect Options:** * **Complete Breech:** Both hips and knees are flexed (sitting cross-legged). While more favorable than footling, the irregular shape is less efficient at dilating the cervix than the frank breech, and the risk of cord prolapse is higher (4–5%). * **Footling Breech:** One or both feet are the presenting part. This is the **least favorable** and most dangerous because the narrow feet cannot dilate the cervix adequately, and there is a high risk of cord prolapse (15–20%). * **Extended Head Breech:** This refers to a "stargazing fetus" where the fetal head is hyperextended. This is a **contraindication** for vaginal delivery as it can lead to cervical spine injury or obstructed labor. **High-Yield Clinical Pearls for NEET-PG:** * **Most common type:** Frank breech is the most common variety (60–70%), especially in primigravidae. * **Cord Prolapse Risk:** Footling (Highest) > Complete > Frank (Lowest). * **Prerequisite for Vaginal Breech Delivery:** The fetal head must be flexed, and the estimated fetal weight should ideally be between 2.5 kg and 3.5 kg.

Q: A G2P1 patient presents at 34 weeks of pregnancy in labor with cervical dilatation of 3 cm and minimal uterine contractions. After artificial rupture of membranes, fresh bleeding is observed along with late decelerations. An emergency cesarean section was performed, but the fetus could not be saved. No abruption or placenta previa was noted. What is the most likely diagnosis?

Vasa previa. **Explanation:** The clinical presentation of **Vasa Previa** is classic: painless vaginal bleeding (fetal blood) occurring immediately after the **rupture of membranes (ROM)**, followed by rapid fetal distress (late decelerations or bradycardia) and fetal demise. In vasa previa, fetal vessels run unprotected by Wharton’s jelly across the internal os. When the membranes rupture, these vessels tear, leading to rapid fetal exsanguination since the total fetal blood volume is very small (~80-100 mL/kg). **Why other options are incorrect:** * **Concealed Abruptio Placentae:** While it causes fetal distress, it is usually associated with severe abdominal pain, a "woody hard" uterus, and the absence of fresh vaginal bleeding. The question specifically ruled out abruption during the C-section. * **Battledore Placenta:** This refers to the insertion of the umbilical cord at the placental margin. While it can lead to vasa previa if vessels traverse the membranes, the term itself describes a placental morphology that does not inherently cause bleeding unless vessels are ruptured. * **Placenta Accreta:** This is a disorder of placental adhesion to the myometrium. It typically presents with a failure of placental separation and massive postpartum hemorrhage, not fetal bleeding during labor. **Clinical Pearls for NEET-PG:** * **Triad of Vasa Previa:** Rupture of membranes + Painless vaginal bleeding + Fetal distress (bradycardia/sinusoidal pattern). * **Apt Test / Kleihauer-Betke Test:** Used to differentiate fetal blood from maternal blood in vaginal discharge. * **Risk Factors:** Velamentous cord insertion, succenturiate placental lobes, and IVF pregnancies. * **Management:** If diagnosed prenatally via Doppler USG, elective C-section is planned at 34–35 weeks. If diagnosed during labor, immediate emergency C-section is mandatory.

Q: When should IV Ergotamine be administered?

After the delivery of the shoulder. **Explanation:** The administration of **IV Ergotamine (or Ergometrine)** is a critical step in the active management of the third stage of labor (AMTSL). **Why Option A is Correct:** Ergotamine is a potent uterotonic that causes **tetanic (sustained) uterine contractions**. It is administered after the delivery of the anterior shoulder to ensure the uterus contracts immediately after the fetus is expelled. This rapid contraction compresses the intramyometrial blood vessels (the "living ligatures"), effectively preventing Primary Postpartum Hemorrhage (PPH). If given earlier, it risks trapping the fetus; if given later, it may trap a detached placenta. **Why Other Options are Incorrect:** * **B. Breech Extraction:** Administering ergotamine before the head is delivered can cause the cervix to spasm or the uterus to contract violently, leading to **head entrapment**, fetal hypoxia, or intracranial hemorrhage. * **C. Twin Pregnancy (after first child):** Ergotamine is strictly contraindicated until the **last** fetus is delivered. Giving it after the first twin would cause uterine hypertonicity, leading to fetal distress or placental abruption for the second twin. * **D. Face Presentation:** Like any malpresentation, the priority is safe delivery of the fetus. Uterotonics should never be given while the fetus is still in the birth canal (except at the shoulder) as it can cause **uterine rupture**. **High-Yield NEET-PG Pearls:** * **Drug of Choice for PPH Prophylaxis:** Oxytocin (10 IU IM) is now preferred over Ergometrine due to fewer side effects. * **Contraindications for Ergotamine:** Hypertension (Preeclampsia/Eclampsia), Heart Disease (causes sudden increase in venous return), and Rh-negative mothers (may cause feto-maternal micro-transfusion). * **Side Effects:** Nausea, vomiting, and transient hypertension.

Q: Which cardinal movements occur during labor?

All of the above. The cardinal movements of labor, also known as the **mechanisms of labor**, refer to the series of positional changes the fetal head undergoes to navigate the maternal bony pelvis. **Explanation of the Correct Answer:** The correct answer is **D (All of the above)** because labor is a continuous process involving several distinct but overlapping movements. The standard sequence includes: 1. **Engagement:** The biparietal diameter passes the pelvic inlet. 2. **Descent:** The continuous downward movement (the prerequisite for all other movements). 3. **Flexion:** The chin is brought into contact with the fetal thorax, changing the presenting diameter to the smaller suboccipitobregmatic (9.5 cm). 4. **Internal Rotation:** The occiput rotates (usually anteriorly) to align with the AP diameter of the pelvic outlet. 5. **Extension:** The head is delivered as the occiput passes under the symphysis pubis. 6. **Restitution & External Rotation:** The head aligns with the shoulders. 7. **Expulsion:** Delivery of the body. **Why other options are incorrect:** Options A, B, and C are individual components of the mechanism of labor. While each is a cardinal movement, selecting any one individually would be incomplete. In NEET-PG, when multiple correct physiological steps are listed, "All of the above" is the most comprehensive choice. **High-Yield Clinical Pearls for NEET-PG:** * **Descent** is the only movement that occurs throughout the entire process of labor. * **Internal rotation** occurs at the level of the pelvic floor (levator ani muscles). * The **suboccipitobregmatic diameter** (9.5 cm) is the smallest presenting diameter in a well-flexed head. * **Restitution** is the visible external movement of the head that corrects the 45-degree twist created during internal rotation.

Q: What complication is associated with a paracervical block?

Fetal bradycardia. **Explanation:** **Paracervical block** is a regional anesthesia technique used during the first stage of labor to provide relief from cervical dilation and uterine contractions. It involves injecting a local anesthetic (like lidocaine) into the fornices of the vagina at the 3 and 9 o'clock positions. **Why Fetal Bradycardia is the correct answer:** The most significant and characteristic complication of a paracervical block is **fetal bradycardia**, occurring in approximately 10–15% of cases. This typically develops 2 to 10 minutes after injection. The underlying mechanism is believed to be **uterine artery vasoconstriction** or direct toxicity due to the proximity of the anesthetic to the uterine arteries, leading to decreased placental perfusion and fetal hypoxia. **Analysis of Incorrect Options:** * **A. Inhibition of labor:** Paracervical blocks do not typically inhibit uterine contractions or prolong the first stage of labor; they only block sensory nerve transmission. * **C. Increased loss of blood:** This is not a direct complication of the block itself, although accidental intravascular injection can cause systemic maternal toxicity. * **D. Atonicity of uterus:** The block affects the nerve supply (Frankenhauser’s plexus) but does not interfere with the myometrium's ability to contract postpartum. **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** Only for the **first stage** of labor (pain from cervical dilation). It does not provide anesthesia for the second stage (perineal pain). * **Contraindication:** It should be avoided in cases of **uteroplacental insufficiency** or a non-reassuring fetal heart rate, as it can exacerbate fetal distress. * **Alternative:** For the second stage of labor, a **Pudendal block** is preferred to provide anesthesia for episiotomy and forceps delivery.

Q: What is the most common type of pelvis associated with a direct occipitoposterior position during labor?

Anthropoid. **Explanation:** The **Anthropoid pelvis** is characterized by an anteroposterior (AP) diameter that is longer than the transverse diameter (oval-shaped inlet). Due to the narrow transverse diameter and a spacious posterior segment, the fetal head often engages in the AP diameter. This anatomical configuration favors the **Direct Occipitoposterior (OP)** or Occito-anterior position, as there is more room for the head to fit in the long AP axis rather than rotating transversely. **Analysis of Options:** * **Gynaecoid (A):** The "normal" female pelvis with a round inlet. It typically favors transverse engagement followed by rotation to **Occipito-anterior (OA)**. * **Platypelloid (B):** A "flat" pelvis with a short AP and wide transverse diameter. It strongly favors **persistent transverse position** (Deep Transverse Arrest) because the head cannot rotate into the narrow AP diameter. * **Android (D):** A "heart-shaped" or masculine pelvis. It is frequently associated with **transverse or oblique** engagement and is the most common pelvis associated with **Persistent Occipitoposterior** (where the head fails to rotate), often leading to obstructed labor. **NEET-PG High-Yield Pearls:** * **Most common pelvis:** Gynaecoid (50%). * **Least common pelvis:** Platypelloid (3%). * **Direct OP:** Associated with Anthropoid pelvis (favorable prognosis for vaginal delivery). * **Deep Transverse Arrest:** Most common in Platypelloid and Android pelvis. * **Caldwell-Moloy Classification:** The standard system used to classify pelvic shapes based on the inlet.

Question 1

A pregnant woman at 38 weeks gestation presents with painless vaginal bleeding. On examination, the head is engaged and the uterus is non-tender and relaxed. What is the next line of treatment?

Accepted Answer

Termination of pregnancy

Answer

Per speculum examination

Answer

Conservative management

Answer

Ultrasonography

Question 2

All of the following are causes of Disseminated Intravascular Coagulation (DIC), except?

Accepted Answer

Multiple pregnancy

Answer

Intrauterine death

Answer

Missed abortion

Answer

Abruptio placentae

Question 3

Which of the following is the most favorable breech presentation?

Accepted Answer

Extended breech

Answer

Complete breech

Answer

Footling breech

Answer

Extended head breech

Question 4

Vaginal delivery is contraindicated in which of the following conditions?

Accepted Answer

Previous classical Cesarean section

Answer

Preterm labor

Answer

Previous lower segment Cesarean section

Answer

Face presentation

Question 5

A G2P1 patient presents at 34 weeks of pregnancy in labor with cervical dilatation of 3 cm and minimal uterine contractions. After artificial rupture of membranes, fresh bleeding is observed along with late decelerations. An emergency cesarean section was performed, but the fetus could not be saved. No abruption or placenta previa was noted. What is the most likely diagnosis?

Accepted Answer

Vasa previa

Answer

Concealed abruptio placentae

Answer

Battledore placenta

Answer

Placenta accreta

Question 6

When should IV Ergotamine be administered?

Accepted Answer

After the delivery of the shoulder

Answer

During breech extraction

Answer

In twin pregnancy, after the first child is delivered

Answer

During face presentation

Question 7

Which cardinal movements occur during labor?

Accepted Answer

All of the above

Answer

Flexion

Answer

Extension

Answer

Internal rotation and Descent both

Question 8

What complication is associated with a paracervical block?

Accepted Answer

Fetal bradycardia

Answer

Inhibition of labor

Answer

Increased loss of blood

Answer

Atonicity of uterus

Question 9

What is the most common type of pelvis associated with a direct occipitoposterior position during labor?

Accepted Answer

Anthropoid

Answer

Gynaecoid

Answer

Platypelloid

Answer

Android

Question 10

Which of the following statements accurately describes the instrumental delivery system?

Accepted Answer

Ventouse (vacuum extraction) is used when forceps are not suitable or have failed.

Answer

Forceps are only used when the cervix is fully dilated.

Answer

Ventouse can be used in rotational deliveries for occipito-posterior and transverse presentations.

Answer

Forceps can be used in breech deliveries.

Labor and Delivery — MCQs

Labor and Delivery — MCQs

On this page

Practice by Chapter

Want unlimited practice?