Labor and Delivery Practice Questions

Q: All of the following are known side effects with the use of tocolytic therapy except?

Fever. **Explanation:** Tocolytics are drugs used to suppress uterine contractions to delay preterm labor. The correct answer is **Fever**, as it is not a recognized side effect of standard tocolytic agents. In the context of preterm labor, fever is more likely an indicator of **chorioamnionitis**, which is actually a contraindication to tocolytic therapy. **Analysis of Options:** * **Tachycardia (A):** This is a classic side effect of **Beta-2 agonists** (e.g., Ritodrine, Terbutaline) due to cross-reactivity with Beta-1 receptors in the heart. It can also occur with Calcium Channel Blockers (Nifedipine) as reflex tachycardia due to vasodilation. * **Hypotension (B):** This is the primary side effect of **Nifedipine** (CCB) and can also occur with Magnesium Sulfate and Beta-mimetics due to peripheral vasodilation. * **Hyperglycemia (C):** Beta-mimetics stimulate glycogenolysis in the liver, leading to increased blood glucose levels. This requires cautious use or avoidance in diabetic pregnant patients. **High-Yield Clinical Pearls for NEET-PG:** 1. **First-line Tocolytic:** Nifedipine is currently the preferred first-line agent due to its oral route and better safety profile. 2. **Atosiban:** A competitive Oxytocin receptor antagonist; it has the fewest side effects but is expensive. 3. **Magnesium Sulfate ($MgSO_4$):** Primarily used for **neuroprotection** of the fetus (if <32 weeks) rather than primary tocolysis. Watch for loss of knee jerk reflex as an early sign of toxicity. 4. **Indomethacin:** A COX inhibitor used for tocolysis; its major risk is **premature closure of the Ductus Arteriosus** and oligohydramnios (avoid after 32 weeks). 5. **Contraindication:** Tocolytics should never be used if there is evidence of intrauterine infection, fetal distress, or abruption.

Q: Which of the following measures does NOT help prevent perineal injury during normal labor?

Routine episiotomy. **Explanation:** The goal of perineal management during labor is to minimize trauma. Modern obstetric practice has shifted away from the traditional belief that routine episiotomy prevents severe tears. **Why "Routine Episiotomy" is the correct answer:** Evidence-based guidelines (ACOG and WHO) now recommend **restrictive** rather than routine episiotomy. Routine episiotomy actually increases the risk of sustaining **3rd and 4th-degree perineal tears** (extension into the anal sphincter) and is associated with higher rates of infection, dyspareunia, and pelvic floor dysfunction. It does not protect the perineum; it creates a surgical injury that can propagate further. **Why the other options are wrong:** * **A. Maintaining flexion:** Keeping the head flexed ensures that the smallest diameter (**Suboccipitobregmatic – 9.5 cm**) distends the vulva. Deflexion increases the diameter, leading to greater perineal stretching and injury. * **C. Slow delivery between contractions:** Delivering the head slowly and controlled (often using the **Ritgen maneuver**) allows the perineal tissues to stretch gradually rather than snap under sudden pressure. * **D. Effective perineal support:** Manual support (guarding the perineum) helps stabilize the tissues and control the speed of crowning, reducing the incidence of spontaneous lacerations. **High-Yield Clinical Pearls for NEET-PG:** * **Mediolateral episiotomy** is preferred over midline in India to reduce the risk of Anal Sphincter Injuries (OASIS). * The best time for episiotomy is when the perineum is thinned out and **3-4 cm of the head is visible** during a contraction (crowning). * **Perineal massage** in the antenatal period (from 34 weeks) is a proven measure to reduce the risk of trauma in primigravidas.

Q: Which maneuver is being shown below?

Ritgen maneuver. ***Ritgen maneuver*** - The **Ritgen maneuver** involves applying **upward pressure** on the fetal chin through the **perineum** during crowning to control delivery of the head. - This technique helps **protect the perineum** from tearing and allows for **controlled extension** of the fetal head during the second stage of labor. *Wood's maneuver* - **Wood's screw maneuver** is used specifically for **shoulder dystocia**, involving rotation of the posterior shoulder to disimpact it. - This maneuver requires inserting fingers into the vagina to rotate the fetus, not external perineal pressure as shown. *Burns Marshall maneuver* - The **Burns Marshall maneuver** is used during **breech delivery** to assist delivery of the aftercoming head. - This technique involves **flexion and traction** on the fetal legs and body, not perineal pressure during vertex delivery. *Zavanelli maneuver* - The **Zavanelli maneuver** involves **replacing the fetal head** back into the uterus when shoulder dystocia cannot be resolved. - This is an **emergency procedure** followed by **cesarean delivery**, not a routine delivery technique as depicted.

Q: Variable deceleration indicates:

Cord compression. **Explanation:** **Variable decelerations** are defined as abrupt decreases in fetal heart rate (FHR) that vary in onset, depth, and duration. They are the most common type of deceleration seen during labor. **1. Why Cord Compression is Correct:** Variable decelerations are caused by **umbilical cord compression**. When the cord is compressed, the umbilical vein is occluded first, causing a transient drop in fetal cardiac output and a compensatory rise in FHR (the "shoulder"). Subsequently, the umbilical artery is occluded, leading to a sudden increase in fetal peripheral resistance and baroreceptor-mediated vagal stimulation, which results in the characteristic sharp "V-shaped" drop in heart rate. **2. Why Other Options are Incorrect:** * **A. Head compression:** This causes **Early decelerations**, which are symmetrical, gradual, and mirror the uterine contraction. * **C. Fetal hypoxemia:** While severe or prolonged variable decelerations can lead to hypoxia, the primary cause of **Late decelerations** is uteroplacental insufficiency, which is the hallmark of fetal hypoxia/acidosis. * **D. Maternal sedation:** This typically causes a **decrease in FHR variability** (a "flat" baseline) rather than periodic decelerations. **Clinical Pearls for NEET-PG:** * **VEAL CHOP Mnemonic:** * **V**ariable = **C**ord compression * **E**arly = **H**ead compression * **A**ccelerations = **O**kay (Fetal oxygenation) * **L**ate = **P**lacental insufficiency * **Management:** Initial steps for variable decelerations include maternal position change (left lateral), oxygen administration, and stopping oxytocin. If persistent and severe, **amnioinfusion** may be considered to relieve cord pressure. * **Rule of 15:** Variable decelerations are defined as a decrease of $\ge$ 15 bpm, lasting $\ge$ 15 seconds but < 2 minutes.

Q: Which of the following is NOT a cause of prolonged first stage of labor?

Rigid perineum. **Explanation:** The **first stage of labor** begins with the onset of true labor pains and ends with full cervical dilatation (10 cm). Any factor that hinders uterine efficiency or fetal descent through the birth canal can prolong this stage. **Why "Rigid Perineum" is the correct answer:** The perineum is the anatomical structure involved in the **second stage of labor** (from full dilatation to delivery of the fetus). A rigid perineum offers resistance only when the fetal head is on the pelvic floor, potentially causing a prolonged second stage or requiring an episiotomy. It has no physiological impact on cervical dilatation or the first stage of labor. **Analysis of Incorrect Options:** * **Weak uterine contractions (Hypotonic Uterine Inertia):** This is the most common cause of a prolonged first stage. Without adequate frequency and intensity of contractions, the cervix fails to dilate. * **Cephalopelvic Disproportion (CPD):** If the fetal head is too large for the maternal pelvis, it cannot descend to apply pressure on the cervix. This lack of "form-fitting" pressure leads to poor cervical effacement and dilatation. * **Transverse presentation:** Malpresentations prevent the presenting part from engaging in the pelvis. This results in an irregular application of the fetus against the cervix, leading to slow or arrested dilatation. **Clinical Pearls for NEET-PG:** * **Friedman’s Curve:** Used to track labor progress. A prolonged latent phase is defined as >20 hours in primigravida and >14 hours in multigravida. * **Active Phase Arrest:** Diagnosed if there is no cervical change for ≥4 hours with adequate contractions or ≥6 hours with inadequate contractions. * **Management:** For weak contractions, the treatment of choice is **Oxytocin** augmentation and/or **Amniotomy** (ARM).

Q: The distance from the upper end of sacrum to the lower border of the pubis corresponds to which conjugate?

Diagonal conjugate. ### Explanation The pelvic inlet (brim) has three critical anteroposterior diameters. Understanding the specific landmarks for each is essential for assessing pelvic adequacy for labor. **1. Why Diagonal Conjugate is Correct:** The **Diagonal Conjugate** is the distance from the **sacral promontory (upper end of the sacrum) to the lower border of the symphysis pubis**. It is the only anteroposterior diameter that can be measured clinically during a per-vaginal (PV) examination. Its normal value is approximately **12 cm**. **2. Analysis of Incorrect Options:** * **True Conjugate (Anatomical Conjugate):** This is the distance from the sacral promontory to the **upper border** of the symphysis pubis. It measures about 11 cm but cannot be measured clinically. * **Obstetric Conjugate:** This is the shortest diameter through which the fetal head must pass. It extends from the sacral promontory to a point on the **inner surface** of the symphysis pubis (about 1 cm below the upper border). It measures approximately 10.5 cm. * **Transverse Conjugate:** This is the widest distance between the two iliopectineal lines, measuring about 13 cm. It is a lateral measurement, not an anteroposterior one. **3. NEET-PG High-Yield Pearls:** * **Calculation:** Obstetric Conjugate = Diagonal Conjugate minus 1.5 to 2 cm. * **Clinical Significance:** If the diagonal conjugate is >11.5 cm, the pelvis is likely adequate for a normal delivery. * **Contracted Pelvis:** A diagonal conjugate of less than 11.5 cm suggests a contracted pelvic inlet. * **Landmark Tip:** Always remember: **U**pper border = Tr**u**e; **L**ower border = Diagona**l**; **I**nner surface = Obstetr**i**c.

Q: Recurrent breech presentation is due to:

Septate uterus. **Explanation:** The correct answer is **C. Septate uterus**. **Why Septate Uterus is Correct:** The primary factor determining fetal presentation is the **"Law of Accommodation,"** where the fetus maneuvers to fit its largest parts into the roomiest parts of the uterus. In a normal uterus, the fundus is wider, accommodating the bulky breech and limbs. However, in a **septate or bicornuate uterus**, the shape of the uterine cavity is permanently distorted. This structural anomaly restricts fetal rotation and often forces the head into the fundus, leading to **recurrent** (habitual) breech presentation in successive pregnancies. **Analysis of Incorrect Options:** * **A. Placenta Previa:** While this can cause a breech presentation by occupying the lower uterine segment, it is usually a sporadic occurrence and does not typically cause *recurrent* breech unless the placenta implants in the same location repeatedly (which is not the rule). * **B. Hydrocephalus:** This is a fetal anomaly where the enlarged head prefers the roomier fundus. While it causes breech presentation, it is generally an isolated event in a specific pregnancy rather than a cause of recurrence. * **D. Short Cord:** A short umbilical cord can restrict fetal movement and prevent the fetus from turning into a cephalic version, but like hydrocephalus, it is usually a one-time complication of a specific pregnancy. **Clinical Pearls for NEET-PG:** * **Most common cause of breech:** Prematurity (the fetus hasn't turned yet). * **Most common cause of *recurrent* breech:** Uterine anomalies (Septate > Bicornuate). * **Cornual implantation of the placenta** is also a known risk factor for breech. * **Management:** External Cephalic Version (ECV) is the preferred method to convert breech to cephalic at 36 weeks (primigravida) or 37 weeks (multigravida), provided there are no contraindications like a septate uterus.

Q: A 25-year-old G2P2 patient with B negative blood group presents in active labor and is fully dilated. Which of the following standard procedures should NOT be followed in this patient?

Liberal prophylactic use of ergometrine.. ### Explanation The primary goal in managing a Rh-negative mother during labor is to **prevent feto-maternal hemorrhage (FMH)**, which can lead to isoimmunization. **Why Option D is the Correct Answer:** The use of **Ergometrine** (especially intravenously) for the active management of the third stage of labor is avoided in Rh-negative patients. Ergometrine causes **tonic uterine contractions**, which can force fetal blood into the maternal circulation (retrograde flow) through the placental site, significantly increasing the risk of feto-maternal micro-transfusion and subsequent sensitization. Oxytocin is the preferred uterotonic as it produces rhythmic contractions. **Analysis of Incorrect Options:** * **Option A:** Cord blood must be collected to determine the newborn's blood group, Rh status, and to perform a Direct Coombs Test (DCT). EDTA is used for blood grouping, while plain tubes are used for cross-matching or bilirubin levels if needed. * **Option B:** **Early clamping** of the umbilical cord is recommended in Rh-negative pregnancies. This prevents the "milking" of fetal blood from the placenta back into the fetal circulation or potentially into the maternal sinuses during placental separation. * **Option C:** **Manual removal of the placenta** is a high-risk procedure for FMH. It should be avoided unless absolutely necessary (e.g., retained placenta with hemorrhage) to minimize trauma to the placental site. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Dose:** 300 mcg of Anti-D immunoglobulin neutralizes 15 ml of fetal RBCs (or 30 ml of whole fetal blood). * **Kleihauer-Betke Test:** Used to quantify the volume of FMH to determine if additional doses of Anti-D are required. * **Timing:** Anti-D should be administered within **72 hours** of delivery. * **Prophylaxis:** Routine antenatal Anti-D prophylaxis (RAADP) is typically given at **28 weeks** gestation.

Question 1

All of the following are known side effects with the use of tocolytic therapy except?

Accepted Answer

Fever

Answer

Tachycardia

Answer

Hypotension

Answer

Hyperglycemia

Question 2

Which of the following measures does NOT help prevent perineal injury during normal labor?

Accepted Answer

Routine episiotomy

Answer

Maintaining flexion of the fetal head

Answer

Slow delivery of the head between contractions

Answer

Effective perineal support

Question 3

Which maneuver is being shown below?

Accepted Answer

Ritgen maneuver

Answer

Wood's maneuver

Answer

Burns Marshall maneuver

Answer

Zavanelli maneuver

Question 4

Variable deceleration indicates:

Accepted Answer

Cord compression

Answer

Head compression

Answer

Fetal hypoxemia

Answer

Maternal sedation

Question 5

Which of the following is NOT a cause of prolonged first stage of labor?

Accepted Answer

Rigid perineum

Answer

Weak uterine contractions

Answer

Cephalopelvic disproportion (CPD)

Answer

Transverse presentation

Question 6

A 16-year-old female presents with severe abdominal pain and fever. Laboratory findings include an elevated white blood cell count and a positive pregnancy test. Colpocentesis is performed to identify pelvic blood, potentially from a ruptured ectopic pregnancy. Through which of the following structures is the needle inserted?

Accepted Answer

The posterior fornix into the rectouterine pouch

Answer

The perineal body into the vesicouterine space

Answer

The anterior fornix into the endocervical canal

Answer

The introitus into the vestibular gland

Question 7

The distance from the upper end of sacrum to the lower border of the pubis corresponds to which conjugate?

Accepted Answer

Diagonal conjugate

Answer

Transverse conjugate

Answer

True conjugate

Answer

Obstetric conjugate

Question 8

What is the largest transverse diameter of the fetal head?

Accepted Answer

Bitemporal diameter

Answer

Biparietal diameter

Answer

Suboccipito-Bregmatic diameter

Answer

Suboccipito-Frontal diameter

Question 9

Recurrent breech presentation is due to:

Accepted Answer

Septate uterus

Answer

Placenta previa

Answer

Hydrocephalus

Answer

Short cord

Question 10

A 25-year-old G2P2 patient with B negative blood group presents in active labor and is fully dilated. Which of the following standard procedures should NOT be followed in this patient?

Accepted Answer

Liberal prophylactic use of ergometrine.

Answer

Cord blood should be saved in both plain and EDTA tubes.

Answer

Early clamping of the umbilical cord.

Answer

Avoidance of manual removal of the placenta.

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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