Labor and Delivery Practice Questions

Q: A primipara with a breech presentation is in the second stage of labor for 2 hours. The fetal heart rate is 140 beats per minute. She is experiencing 3 uterine contractions per 10 minutes. The breech is felt at the level of the ischial spines. The membranes are absent. The pelvis is adequate. The estimated fetal weight is 3 kg. What is the most appropriate management?

Perform a lower segment cesarean section. **Explanation:** The core issue in this clinical scenario is **failure to progress in the second stage of labor** with a **breech presentation**. In a primipara, the second stage of labor is considered prolonged if it exceeds 2 hours (without epidural). This patient has already reached the 2-hour mark, and the breech is still at the level of the **ischial spines (Station 0)**. For a safe vaginal breech delivery, the breech must be deeply engaged and descending rapidly to ensure the after-coming head does not get trapped. A breech at the ischial spines after 2 hours of pushing indicates **cephalopelvic disproportion (CPD)** or poor progress, making vaginal delivery hazardous. Therefore, an immediate **Lower Segment Cesarean Section (LSCS)** is the safest management to avoid fetal morbidity. **Analysis of Incorrect Options:** * **A & B:** Oxytocin or hydration are used for uterine inertia. However, this patient has adequate contractions (3 in 10 minutes). Adding oxytocin in a breech presentation with poor descent is contraindicated as it increases the risk of birth trauma and cord prolapse. * **C:** Observation is inappropriate. In breech labor, "waiting" during a stalled second stage significantly increases the risk of fetal hypoxia and intracranial hemorrhage. **Clinical Pearls for NEET-PG:** * **Term Breech Trial:** Established that planned CS is safer than vaginal delivery for term breech presentations. * **Prerequisites for Vaginal Breech:** Adequate pelvis, fetal weight 2.5–3.5 kg, frank/complete breech, and flexed head. * **Station:** A breech at station 0 in the second stage is a "high breech" and a red flag for obstruction.

Q: A 3,800-gram male infant is delivered vaginally after a shoulder dystocia was encountered. If a neonatal injury is suspected, what is the likely finding in the infant?

Arm that is at its side and internally rotated. **Explanation:** The clinical scenario describes a classic complication of **shoulder dystocia**: traction on the fetal head during delivery leading to **Erb’s Palsy**. This is the most common neonatal injury associated with shoulder dystocia, resulting from damage to the upper trunk of the brachial plexus (**C5-C6 nerve roots**). **1. Why Option A is Correct:** Damage to C5-C6 affects the axillary, suprascapular, and musculocutaneous nerves. This leads to paralysis of the deltoid, supraspinatus, infraspinatus, and biceps brachii. The characteristic clinical posture is the **"Waiters Tip" deformity**: * **Adduction and Internal Rotation** of the arm (due to paralyzed abductors and external rotators). * **Extension of the elbow** (due to paralyzed biceps). * **Pronation of the forearm.** **2. Why Other Options are Incorrect:** * **Option B:** A fixed, flexed, and hypotonic arm does not match the specific dermatomal pattern of Erb’s palsy. * **Option C:** Dislocated elbows are rare birth injuries and are not typically associated with the traction forces of shoulder dystocia. * **Option D:** While **Clavicle fracture** is the most common *bone* injury in shoulder dystocia, Erb’s palsy (Option A) is a more classic "finding" or "presentation" tested in the context of nerve injury patterns. In many exams, if Erb's palsy is an option, it is the preferred answer for "likely finding" regarding limb posture. **Clinical Pearls for NEET-PG:** * **Klumpke’s Palsy:** Injury to **C8-T1**; presents with a **"Claw hand"** (paralysis of intrinsic hand muscles) and may be associated with Horner’s syndrome. * **Risk Factors for Shoulder Dystocia:** Maternal diabetes, fetal macrosomia (>4000g), and prolonged second stage of labor. * **Management:** The first step is the **McRoberts Maneuver** (hyperflexion of maternal thighs) followed by **Suprapubic pressure**. Avoid fundal pressure as it worsens impaction.

Q: Controlled ARM is indicated in which of the following conditions?

Polyhydramnios. **Explanation:** **Controlled Artificial Rupture of Membranes (ARM)** is a specialized technique used when there is a high risk of **cord prolapse** or **abruptio placentae** due to a sudden gush of amniotic fluid. 1. **Why Polyhydramnios is correct:** In polyhydramnios, the excessive volume of amniotic fluid keeps the fetal presenting part high and unengaged. A spontaneous or standard ARM would cause a rapid decompression and a "rush" of fluid, which can wash the umbilical cord down (Cord Prolapse) or cause sudden uterine shrinkage leading to premature placental separation (Abruptio Placentae). **Controlled ARM** involves using a needle or a small puncture to allow the fluid to escape slowly and under stabilization, ensuring the presenting part settles into the pelvis gradually. 2. **Why other options are incorrect:** * **Maternal HIV & Genital Herpes:** ARM is generally avoided or delayed in these cases to maintain the integrity of the membranes as long as possible. Intact membranes act as a barrier, reducing the risk of **Vertical Transmission** of the virus to the fetus during labor. * **IUD placement:** This is a contraceptive procedure unrelated to the management of active labor or membrane rupture. **High-Yield Clinical Pearls for NEET-PG:** * **Prerequisites for ARM:** The cervix must be dilated, and the fetal head must be well-applied to the cervix to prevent cord accidents. * **Other indications for Controlled ARM:** High-head at term (unengaged) and Hydramnios. * **Immediate Action Post-ARM:** Always auscultate the **Fetal Heart Rate (FHR)** immediately after rupture to rule out occult cord prolapse. * **Color of Liquor:** ARM also helps in assessing the color of liquor (e.g., meconium-stained, golden yellow in Rh incompatibility, or tobacco juice in IUD).

Q: Oxytocin infusion should be discontinued if there are more than ----- contractions consistently every 15 minutes?

7. **Explanation:** The correct answer is **7 contractions every 15 minutes**. **1. Why 7 is the Correct Answer:** Oxytocin is a potent uterotonic agent used for the induction and augmentation of labor. The primary goal is to achieve an adequate contraction pattern (typically 3–4 contractions in 10 minutes) without causing **uterine tachysystole** or hyperstimulation. According to standard obstetric guidelines (including Williams Obstetrics), oxytocin infusion must be discontinued if uterine activity becomes excessive. Specifically, more than **7 contractions in a 15-minute period** (or more than 5 in 10 minutes) is a clear indication of hyperstimulation. Excessive contractions reduce uteroplacental blood flow during the relaxation phase, leading to fetal hypoxia and potential uterine rupture. **2. Analysis of Incorrect Options:** * **Option A (3):** This is the goal for adequate labor (3 contractions per 10 minutes). Discontinuing at this stage would lead to failed induction. * **Option B (5):** While 5 contractions in **10 minutes** is the definition of tachysystole, the question asks for the threshold over **15 minutes**. 5 in 15 minutes is considered a normal, safe rhythm. * **Option D (10):** This represents extreme hyperstimulation. Waiting for 10 contractions in 15 minutes would likely result in fetal distress or maternal complications. **3. High-Yield Clinical Pearls for NEET-PG:** * **Definition of Tachysystole:** >5 contractions in 10 minutes, averaged over a 30-minute window. * **Half-life of Oxytocin:** Very short (3–5 minutes), which allows for rapid reversal of hyperstimulation once the infusion is stopped. * **Water Intoxication:** A rare but high-yield side effect of high-dose oxytocin due to its structural similarity to ADH (Antidiuretic Hormone). * **Management of Hyperstimulation:** 1. Stop Oxytocin; 2. Left lateral position; 3. Oxygen administration; 4. Consider Tocolytics (e.g., Terbutaline) if fetal distress persists.

Q: What is the diameter of the fetal head in a totally deflexed presentation?

Occipito-frontal. In fetal malpresentations, the diameter of the fetal head engaging the maternal pelvis is determined by the **degree of flexion or extension** of the neck. ### **Explanation of the Correct Answer** In a **totally deflexed (neutral) head**, the fetus is neither flexed nor extended. This is commonly seen in the **Occipito-posterior (OP)** position. The engaging diameter is the **Occipito-frontal (OF)**, which measures approximately **11.5 cm**. It extends from the occipital protuberance to the root of the nose (glabella). Because this diameter is larger than the suboccipito-bregmatic diameter, it often leads to a prolonged labor. ### **Analysis of Incorrect Options** * **A. Suboccipito-frontal (10 cm):** This diameter is seen in a **partially deflexed** head. It extends from the suboccipital region to the anterior end of the anterior fontanelle. * **C. Submento-bregmatic (9.5 cm):** This is the engaging diameter in a **Face presentation** where the head is **completely extended**. * **D. Suboccipito-bregmatic (9.5 cm):** This is the smallest and most ideal diameter, seen when the head is **completely flexed** (Vertex presentation). ### **NEET-PG High-Yield Pearls** * **Vertex (Well-flexed):** Suboccipito-bregmatic (9.5 cm) – Smallest diameter. * **Vertex (Deflexed/OP):** Occipito-frontal (11.5 cm). * **Brow (Partial extension):** Mento-vertical (13.5 cm) – Largest diameter; usually necessitates C-section. * **Face (Complete extension):** Submento-bregmatic (9.5 cm). * **Rule of Thumb:** As the head deflexes, the engaging diameter increases, making vaginal delivery more difficult until complete extension (Face) is reached.

Q: Which of the following is NOT used in the treatment for postpartum hemorrhage?

Ritodrine. **Explanation:** Postpartum Hemorrhage (PPH) is primarily caused by **uterine atony** (failure of the uterus to contract after delivery). Management requires **uterotonic agents**—drugs that increase uterine contractions to compress intramyometrial blood vessels. **Why Ritodrine is the correct answer:** Ritodrine is a **Beta-2 agonist**. Its mechanism of action is to relax the uterine smooth muscle (**tocolysis**). It is used to arrest preterm labor, not to treat hemorrhage. Administering a tocolytic during PPH would worsen uterine atony and increase bleeding, making it contraindicated. **Analysis of Incorrect Options (Uterotonics used in PPH):** * **Oxytocin:** The first-line agent for both prophylaxis and treatment of PPH. It acts on G-protein coupled receptors to trigger rhythmic upper segment contractions. * **Carboprost (15-methyl PGF2α):** A potent prostaglandin used when oxytocin fails. It is administered intramuscularly but is contraindicated in patients with **asthma** due to its bronchoconstrictive effects. * **Ergometrine:** An ergot alkaloid that causes tetanic uterine contractions. It is highly effective but contraindicated in patients with **hypertension or pre-eclampsia** as it causes peripheral vasoconstriction. **NEET-PG High-Yield Pearls:** * **Definition of PPH:** Blood loss >500 ml (Vaginal) or >1000 ml (C-section). * **Active Management of Third Stage of Labor (AMTSL):** Reduces PPH risk by 60%; Oxytocin (10 IU IM) is the drug of choice. * **Misoprostol (PGE1):** Often used in resource-limited settings (600–800 mcg sublingual/rectal). * **Surgical Management:** If medical management fails, proceed to uterine artery embolization, B-Lynch sutures, or internal iliac artery ligation.

Q: True labor pains is represented by:

Show. **Explanation:** The diagnosis of **True Labor** is based on the presence of regular, rhythmic uterine contractions that increase in frequency and intensity, leading to progressive cervical effacement and dilatation. **Why "Show" is correct:** "Show" refers to the expulsion of the cervical mucus plug mixed with a small amount of blood (from the rupture of small capillaries as the cervix dilates). It is a classic clinical sign of true labor, indicating that cervical changes are actively occurring. While not every patient experiences a visible show, its presence is a strong diagnostic indicator of true labor. **Analysis of Incorrect Options:** * **A. Pain and discomfort in the abdomen:** In true labor, pain typically starts in the **back** and radiates to the front of the abdomen. Pain confined only to the lower abdomen or groin is more characteristic of false labor. * **C. Relieved by enema and administration of sedative:** This is a hallmark of **False Labor**. True labor pains are not relieved by sedatives, enemas, or walking; in fact, they often intensify with activity. * **D. Dull in nature:** True labor pains are described as **colicky and rhythmic**, not dull. They have a distinct pattern of contraction and relaxation. **NEET-PG High-Yield Pearls:** * **The Definitive Sign:** The single most important feature of true labor is **progressive cervical dilatation and effacement**. * **False Labor (Braxton Hicks):** Characterized by irregular contractions, no cervical changes, and relief with sedation/rest. * **Formation of Bag of Waters:** In true labor, the membranes become detached from the lower uterine segment, leading to the formation of the "bag of waters" due to cervical dilatation.

Question 1

A primipara with a breech presentation is in the second stage of labor for 2 hours. The fetal heart rate is 140 beats per minute. She is experiencing 3 uterine contractions per 10 minutes. The breech is felt at the level of the ischial spines. The membranes are absent. The pelvis is adequate. The estimated fetal weight is 3 kg. What is the most appropriate management?

Accepted Answer

Perform a lower segment cesarean section

Answer

Commence an infusion of oxytocin

Answer

Improve maternal hydration with intravenous fluids

Answer

Observe for a further period of 1 hour for spontaneous delivery to occur

Question 2

A 3,800-gram male infant is delivered vaginally after a shoulder dystocia was encountered. If a neonatal injury is suspected, what is the likely finding in the infant?

Accepted Answer

Arm that is at its side and internally rotated

Answer

Arm that is fixed and flexed and hypotonic

Answer

Dislocated elbow

Answer

Clavicle fracture

Question 3

Controlled ARM is indicated in which of the following conditions?

Accepted Answer

Polyhydramnios

Answer

Intrauterine device (IUD) placement

Answer

Maternal HIV infection

Answer

Genital herpes

Question 4

Oxytocin infusion should be discontinued if there are more than ----- contractions consistently every 15 minutes?

Accepted Answer

7

Answer

3

Answer

5

Answer

10

Question 5

What is the diameter of the fetal head in a totally deflexed presentation?

Accepted Answer

Occipito-frontal

Answer

Suboccipito-frontal

Answer

Submento-bregmatic

Answer

Suboccipito-bregmatic

Question 6

Which of the following is NOT used in the treatment for postpartum hemorrhage?

Accepted Answer

Ritodrine

Answer

Oxytocin

Answer

Carboprost

Answer

Ergometrine

Question 7

True labor pains is represented by:

Accepted Answer

Show

Answer

Pain and discomfort in the abdomen

Answer

Relieved by enema and administration of sedative

Answer

Dull in nature

Question 8

Regarding insulin management during labor, all are true except?

Accepted Answer

Blood glucose level during labor should be maintained above 140 mg/dL.

Answer

Usual dose of intermediate-acting insulin is given at bedtime.

Answer

Morning dose of insulin is withheld.

Answer

Once labor begins, normal saline infusion is changed to 5% dextrose.

Question 9

All of the following are true about the delivery of the placenta in the third stage of labor, EXCEPT?

Accepted Answer

Separation of the placenta always manifests as revealed bleeding per vaginam, and is the most specific sign.

Answer

Lengthening of the umbilical cord is a sign of placental separation.

Answer

The fundus of the uterus must be palpated after placental delivery to rule out atonicity.

Answer

Placenta accreta may be a cause for retained placenta.

Question 10

At this stage of delivery, shown in a video clip, which complication can occur and what is its management?

Accepted Answer

Shoulder dystocia, McRobe's manoeuvre

Answer

Shoulder dystocia, Fundal Pressure

Answer

Deep Transverse arrest, Manual rotation & forceps extraction

Answer

Asynclitic head, fundal pressure

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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