Labor and Delivery Practice Questions

Q: A 37-week pregnant female presents with mild labor pain for 10 hours. On examination, the cervix is persistently 1 cm dilated and non-effaced. What is the next appropriate management?

Sedation and observation. ### Explanation The patient is in the **Prolonged Latent Phase** of labor. According to Friedman’s criteria, the latent phase is considered prolonged if it exceeds 20 hours in a primigravida or 14 hours in a multigravida. However, the key clinical finding here is the lack of cervical change (1 cm dilated, non-effaced) despite 10 hours of mild contractions, suggesting **False Labor** or an early latent phase. **1. Why Sedation and Observation is Correct:** The management of a prolonged latent phase is conservative. **Therapeutic rest (sedation)** using morphine or similar agents is the treatment of choice. This helps differentiate between false labor and true labor. After sedation, the patient will either: * Stop having contractions (confirming False Labor). * Wake up in the active phase of labor (confirming True Labor). **2. Why Other Options are Incorrect:** * **B. Augmentation with Oxytocin:** Oxytocin is indicated for protraction or arrest disorders in the **Active Phase** (cervix >4–6 cm). Using it in the latent phase increases the risk of uterine tachysystole and unnecessary intervention. * **C. Cesarean Section:** A prolonged latent phase is NOT an indication for C-section. Delivery is only indicated if there is evidence of fetal distress or maternal exhaustion. * **D. Amniotomy:** Artificial rupture of membranes (ARM) is reserved for the active phase to accelerate labor. Performing it too early increases the risk of chorioamnionitis and cord prolapse. **Clinical Pearls for NEET-PG:** * **Latent Phase:** From onset of labor to 4–6 cm dilation. * **Active Phase:** From 6 cm to 10 cm (full) dilation. * **Friedman’s Curve:** Latent phase >20 hrs (Primi) or >14 hrs (Multi) = Prolonged Latent Phase. * **Management Rule:** Never diagnose "Failure to Progress" in the latent phase; it can only be diagnosed in the active phase.

Q: Successful trial of labour can be expected in:

Flat pelvis. **Explanation:** The success of a trial of labor (TOL) depends on whether the fetal head can overcome the initial pelvic obstruction. In a **Flat (Platypelloid) pelvis**, the primary resistance is at the pelvic inlet due to a shortened anteroposterior (AP) diameter. However, once the head engages—often through the mechanism of **exaggerated asynclitism**—the rest of the pelvis is usually roomy. Since the mid-pelvis and outlet do not pose further obstruction, a successful vaginal delivery is highly likely once the inlet is crossed. **Analysis of Incorrect Options:** * **Android Pelvis:** Known as the "masculine" pelvis, it is funnel-shaped. While the inlet may be adequate, the pelvis narrows progressively toward the outlet (convergent side walls, narrow subpubic angle). This frequently leads to deep transverse arrest and difficult instrumental deliveries, making it unfavorable for TOL. * **Naegele’s Pelvis:** This is a type of asymmetric contracted pelvis caused by the congenital absence of one wing (ala) of the sacrum. The extreme distortion of pelvic diameters usually makes vaginal delivery impossible. * **Generally Contracted Pelvis (Small Gynecoid):** All diameters (inlet, cavity, and outlet) are proportionately reduced. Even if the head engages, it faces continuous resistance at every level of the birth canal, increasing the risk of prolonged labor and failure. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism in Flat Pelvis:** The head enters the inlet in a transverse diameter with **asynclitism** (Naegele’s or Litzmann’s obliquity). * **Most Common Pelvis:** Gynecoid (50%). * **Most Common Malpresentation in Android Pelvis:** Persistent Occipito-posterior (OP) position. * **Robert’s Pelvis:** Congenital absence of both wings of the sacrum (bilateral Naegele’s).

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.

Question 1

Compared with a normally shaped placenta, which complication of third-stage labor is more common with a succenturiate lobe?

Accepted Answer

Retained placenta

Answer

Cord avulsion

Answer

Uterine inversion

Answer

Chorioamnionitis

Question 2

A 37-week pregnant female presents with mild labor pain for 10 hours. On examination, the cervix is persistently 1 cm dilated and non-effaced. What is the next appropriate management?

Accepted Answer

Sedation and observation

Answer

Augmentation with oxytocin

Answer

Cesarean section

Answer

Amniotomy

Question 3

A 39-week gestation patient presents with a footling presentation. What is the most appropriate management?

Accepted Answer

Caesarean section

Answer

Vaginal delivery

Answer

External cephalic version

Answer

Expectant management

Question 4

Successful trial of labour can be expected in:

Accepted Answer

Flat pelvis

Answer

Android pelvis

Answer

Naegele's pelvis

Answer

Generally contracted pelvis

Question 5

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 6

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 7

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 8

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 9

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 10

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

Accepted Answer

Ritodrine

Answer

Oxytocin

Answer

Carboprost

Answer

Ergometrine

Labor and Delivery — MCQs

Labor and Delivery — MCQs

On this page

Practice by Chapter

Want unlimited practice?