Labor and Delivery Practice Questions

Q: In a case of face presentation during labor, which diameter is seen?

Submentobregmatic. ***Submentobregmatic*** - In a **face presentation**, the fetal head is completely extended (deflexed), causing the face to present first in the birth canal. - The presenting diameter is the **submentobregmatic**, which measures approximately **9.5 cm** and extends from the junction of the neck and chin to the anterior fontanelle (bregma). *Mentobregmatic* - This term is sometimes used, but the precise engaging diameter in a face presentation is the **submentobregmatic** diameter. - The **mento-vertical** diameter (**14 cm**), which is the largest, is associated with a **brow presentation** and is too large for a vaginal delivery. *Suboccipitobregmatic* - This is the presenting diameter in a normal, **well-flexed vertex presentation**, which is the most common and favorable presentation. - It measures approximately **9.5 cm** and extends from the nape of the neck (subocciput) to the bregma. *Occipitofrontal* - This diameter is seen when the head is in a **military attitude** (partially deflexed), where neither flexion nor extension is complete. - It measures about **11.5 cm**, which is larger than the ideal presenting diameter and can prolong labor.

Q: A patient's fetal heart rate tracing is shown in the image. The tracing shows variable deceleration. What does that indicate?

Umbilical cord compression. ***Umbilical cord compression*** - Variable decelerations are characterized by an **abrupt decrease** in fetal heart rate with a variable onset, duration, and shape, which is the classic sign of **umbilical cord compression**. - The compression of the umbilical cord causes a reflex **baroreceptor-mediated** slowing of the heart rate, which resolves when the compression is relieved. *Fetal head compression* - This causes **early decelerations**, which are gradual, uniform in shape, and mirror the uterine contraction. - Early decelerations are a result of a **vagal response** to increased intracranial pressure during contractions and are generally considered benign. *Uteroplacental insufficiency* - This leads to **late decelerations**, where the nadir of the deceleration occurs after the peak of the contraction. - Late decelerations signify impaired oxygen exchange at the placenta and are associated with fetal **hypoxemia**. *Maternal hypotension* - Maternal hypotension can reduce blood flow to the placenta, causing **uteroplacental insufficiency**. - This would result in **late decelerations** or potentially a **prolonged deceleration**, not the characteristic variable pattern.

Q: What is the importance of the following manoeuvre?

To protect from tearing of the perineum. ***To protect from tearing of the perineum*** - The maneuver shown, known as **guarding the perineum**, involves one hand supporting the perineal body while the other hand controls the delivery of the fetal head. - This technique allows for a slow, controlled stretching of the perineal tissues, which significantly reduces the risk of **perineal lacerations** during the second stage of labor. *To pull the baby out faster* - Applying traction to the fetal head to expedite delivery is contraindicated as it increases the risk of both maternal trauma, such as severe **perineal tears**, and fetal injury, like **brachial plexus injury**. - The goal of modern obstetrics is a controlled, gentle delivery, not a rapid one, to ensure the safety of both mother and baby. *To facilitate controlled extension of the fetal head* - While controlling the extension of the fetal head is part of the maneuver (performed by the hand on the occiput), its primary purpose is to prevent sudden expulsion, which would tear the perineum. - Therefore, controlled extension is a means to achieve the ultimate goal of **perineal protection**, making it a secondary objective of the overall maneuver shown. *To rotate the shoulders during delivery* - Rotation of the fetal shoulders, specifically to an **anteroposterior diameter**, is performed only *after* the head has been fully delivered and has undergone **restitution** (external rotation). - The image depicts the **crowning** of the fetal head, which is the stage just before the head is born and well before the shoulders are delivered.

Q: Identify the CTG pattern?

Early deceleration. ***Early deceleration*** - This pattern is characterized by a gradual, symmetrical decrease in fetal heart rate (FHR) where the onset, nadir, and recovery of the deceleration coincide with the beginning, peak, and end of a uterine contraction, creating a **mirror image**. - Early decelerations are caused by **fetal head compression** during contractions, which elicits a vagal response. They are considered physiological and are not typically associated with fetal hypoxia or acidosis. *Late decelerations* - These are characterized by a gradual decrease in FHR where the nadir of the deceleration occurs **after the peak** of the uterine contraction, indicating a delayed response. - Late decelerations are a non-reassuring sign caused by **uteroplacental insufficiency**, suggesting impaired oxygen exchange to the fetus. *Variable* - These are abrupt, sharp drops in the FHR that are variable in shape (often V, U, or W-shaped) and have an inconsistent relationship with uterine contractions. - Variable decelerations are caused by **umbilical cord compression**, which obstructs blood flow to the fetus. *Normal* - A normal or reassuring CTG trace would have a baseline FHR between 110-160 bpm, moderate variability (5-25 bpm), and the presence of accelerations with or without early decelerations. - While early decelerations can be part of a normal picture, the question asks to identify the specific pattern of deceleration present, which is 'early deceleration'.

Q: Shoulder dystocia is diagnosed when the anterior shoulder fails to deliver after what time following delivery of the head?

60 sec. ***60 sec*** - Shoulder dystocia is generally defined as the failure of the shoulders to deliver spontaneously after the head is already delivered, requiring additional obstetrical maneuvers. - Using a time criterion, the condition is classified when the interval between the delivery of the fetal head and the delivery of the shoulders exceeds **60 seconds (1 minute)**. - The definition is established at **60 seconds** because delays exceeding this time significantly elevate the risk of fetal injury, particularly **brachial plexus injury**. *15 sec* - This time interval is typically too short to define true shoulder dystocia, as spontaneous delivery of the shoulders often occurs within the first 30 seconds. - A delay of **15 seconds** usually reflects normal variation in the second stage of labor. *30 sec* - While a delay greater than **30 seconds** is sometimes cited as an *increased risk* indicator, it is not the standard, universally endorsed cutoff for formally diagnosing shoulder dystocia. - Most major obstetric guidelines (ACOG and RCOG) use the **60-second** criterion. *45 sec* - Although indicative of a slower process, **45 seconds** falls short of the critical **60-second** mark used by most major obstetric guidelines to classify the complication. - Using 45 seconds could lead to over-diagnosis, while the 60-second rule ensures appropriate identification of high-risk cases.

Q: In which of the following cases is the drug below contraindicated? ![img-52.jpeg](img-52.jpeg)

Malpresentation of fetus. ***Malpresentation of fetus*** - Administering **oxytocin** with fetal malpresentation (e.g., transverse lie, breech) is contraindicated as the powerful contractions against an undeliverable fetus can cause **uterine rupture**. - It also significantly increases the risk of **fetal distress**, cord prolapse, and birth trauma, making a cesarean section the necessary and safer mode of delivery. *Heart disease in mother* - Oxytocin is not absolutely contraindicated and is often used cautiously for labor induction or to prevent **postpartum hemorrhage**, which would be especially dangerous in a patient with heart disease. - Careful monitoring is required due to its potential antidiuretic and cardiovascular effects, but its benefits in preventing hemorrhage often outweigh the risks. *Premature labour* - While **tocolytics** are used to stop premature labor, oxytocin may be used to *induce* labor if a preterm delivery is medically indicated (e.g., severe preeclampsia, fetal distress). - Therefore, prematurity itself is not a contraindication; the clinical goal (stopping vs. inducing labor) determines the appropriate medication. *Hypothyroidism* - Maternal hypothyroidism, when properly managed, is not a contraindication for the use of **oxytocin**. - The drug's mechanism of action on uterine smooth muscle is unrelated to thyroid hormone pathways.

Q: In which of the following cases is the drug below contraindicated?

Malpresentation of fetus. ***Malpresentation of fetus*** - The drug shown is **Oxytocin**, which induces strong uterine contractions. If the fetus is in an abnormal position (e.g., **transverse lie**, **breech**), forcing labor with oxytocin can lead to **uterine rupture** or **cord prolapse**. - Inducing labor in the setting of malpresentation is contraindicated because a safe vaginal delivery is not possible, and it significantly increases the risk of severe **fetal distress** and **maternal trauma**. *Heart disease in mother* - While caution is needed due to potential cardiovascular effects like **hypotension** and water retention, maternal heart disease is a relative contraindication, not an absolute one. - Oxytocin is crucial in the third stage of labor to prevent **postpartum hemorrhage**, which is a major concern in patients with cardiac conditions. *Premature labour* - Oxytocin is used to *induce* or *augment* labor, whereas in premature labor, the primary goal is often **tocolysis** (stopping contractions) with drugs like magnesium sulfate or nifedipine. - It is not a contraindication if a medically indicated preterm delivery is planned; rather, it is used when the decision to deliver has been made. *Hypothyroidism* - Maternal hypothyroidism, especially when well-controlled, is not a recognized contraindication for the use of oxytocin. - There is no known adverse interaction between thyroid status and the action of oxytocin on the uterus.

Q: In a primigravida what is a satisfactory dilation rate?

1.2 cm/hr. ***1.2 cm/hr***- This rate is the classical minimum acceptable cervical dilation velocity during the **active phase of labor** in a **primigravida**, according to the Friedmann curve.- A dilation rate falling below **1.2 cm/hr** in a primigravida is generally treated as an abnormally slow progression, or a **protraction disorder**.*0.5 cm/hr*- A dilation rate of **0.5 cm/hr** is significantly protracted and would be indicative of a high-risk labor pattern requiring re-evaluation and typically intervention, such as **oxytocin augmentation**.- Even the modern, slower labor curves (Zhang curve) do not support such a slow rate as satisfactory for the entire active phase.*0.75 cm/hr*- This rate is below the recognized minimum benchmark of **1.2 cm/hr** for a primigravida during the active phase of labor.- Persistence at this slow rate would likely lead to a diagnosis of **protracted active phase** and increase the risk of maternal and fetal complications.*1.5 cm/hr*- While **1.5 cm/hr** represents rapid and favorable cervical progression, the classical standard for the *minimum satisfactory* rate in a primigravida is established as **1.2 cm/hr**.- **1.5 cm/hr** is often cited as the minimum satisfactory rate for a **multigravida**, who generally progresses faster than a primigravida.

Question 1

In a case of face presentation during labor, which diameter is seen?

Accepted Answer

Submentobregmatic

Answer

Mentobregmatic

Answer

Occipitofrontal

Answer

Suboccipitobregmatic

Question 2

A patient's fetal heart rate tracing is shown in the image. The tracing shows variable deceleration. What does that indicate?

Accepted Answer

Umbilical cord compression

Answer

Maternal hypotension

Answer

Fetal head compression

Answer

Uteroplacental insufficiency

Question 3

What is the importance of the following manoeuvre?

Accepted Answer

To protect from tearing of the perineum

Answer

To rotate the shoulders during delivery

Answer

To facilitate controlled extension of the fetal head

Answer

To pull the baby out faster

Question 4

During the active management of the third stage of labor, which intervention is recommended to prevent postpartum hemorrhage primarily due to uterine atony?

Accepted Answer

Administration of uterotonic agent (oxytocin 10 units IM) within 1 minute of birth

Answer

Immediate administration of 20 units of undiluted oxytocin intravenously

Answer

Controlled cord traction with immediate removal of the placenta

Answer

Oxytocin 10 units IM with crowning

Question 5

Identify the CTG pattern?

Accepted Answer

Early deceleration

Answer

Late deceleration

Answer

Variable

Answer

Normal

Question 6

Shoulder dystocia is diagnosed when the anterior shoulder fails to deliver after what time following delivery of the head?

Accepted Answer

60 sec

Answer

15 sec

Answer

45 sec

Answer

30 sec

Question 7

In which of the following cases is the drug below contraindicated? ![img-52.jpeg](img-52.jpeg)

Accepted Answer

Malpresentation of fetus

Answer

Heart disease in mother

Answer

Premature labour

Answer

Hypothyroidism

Question 8

In which of the following cases is the drug below contraindicated?

Accepted Answer

Malpresentation of fetus

Answer

Premature labour

Answer

Hypothyroidism

Answer

Heart disease in mother

Question 9

In a primigravida what is a satisfactory dilation rate?

Accepted Answer

1.2 cm/hr

Answer

1.5 cm/hr

Answer

0.5 cm/hr

Answer

0.75 cm/hr

Question 10

A 28-year-old primigravida at 38 weeks gestation presents in active labor. Fetal heart rate monitoring shows variable decelerations with each contraction. Cervix is 6 cm dilated, and the umbilical cord is palpable alongside the presenting part. What is the most appropriate immediate management?

Accepted Answer

Manual elevation of presenting part and immediate cesarean section

Answer

Continue labor with continuous fetal monitoring

Answer

Administer tocolytics and position patient in Trendelenburg

Answer

Attempt to replace the cord above the presenting part

Labor and Delivery — MCQs

Labor and Delivery — MCQs

On this page

Practice by Chapter

Want unlimited practice?