Which first-line medication is commonly used during labour induction for intrauterine foetal death?

RRB Nsg. Superintendent -29 April-2025 (shift-2nd)

Obstetrics & Gynecology

Easy

Appeared in: RRB Nsg. Superintendent -29 April-2025 (shift-2nd)

Explanation

Misoprostol is a synthetic prostaglandin E1 (PGE1) analogue, which is the class of drugs recommended for this clinical scenario.
It is the first-line agent for inducing labor in IUFD because it has a dual effect: it ripens the cervix (making it softer and more dilated) and simultaneously stimulates uterine contractions.
This combination is particularly effective and necessary when the cervix is unfavorable (unripe), which is often the case in pregnancies complicated by fetal death.
Clinical guidelines recommend prostaglandins for induction in the second and third trimesters for IUFD to shorten the induction-to-delivery interval.

Option A: Terbutaline is a tocolytic agent. Its function is to relax the uterine muscles to stop or delay preterm labor. This action is the direct opposite of what is required for labor induction.
Option B: Magnesium sulphate's primary roles in obstetrics are to prevent seizures in patients with pre-eclampsia or eclampsia and to provide neuroprotection for the fetus in anticipated preterm births. It is not an agent for inducing labor.
Option C: While Oxytocin is a powerful uterine stimulant, it is most effective on a cervix that is already 'ripe' or favorable. Using it alone on an unfavorable cervix often results in a prolonged or failed induction. It is not the first-line choice for an unripe cervix.

Visual 1: Flowchart: Management algorithm for Intrauterine Fetal Death (IUFD), showing the decision points for using prostaglandins versus oxytocin based on cervical status (Bishop score).
Visual 2: Table: Comparison of Labor Induction Agents, detailing mechanism of action, primary use, and contraindications for Misoprostol, Oxytocin, and Terbutaline.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacological management of labor induction for intrauterine fetal death (IUFD) as background academic context rather than a clinical decision trigger.
A nurse's primary role during induction for IUFD is meticulous monitoring for uterine tachysystole (more than 5 contractions in 10 minutes), a potential side effect of misoprostol that increases the risk of uterine rupture.
Providing comprehensive emotional and psychological support to the patient and family is a critical nursing responsibility, as they are grieving the loss of the fetus while undergoing the physical process of labor.
What if? If the IUFD occurs late in the third trimester and the cervix is already favorable (e.g., Bishop score greater than 6), a provider might choose to start with oxytocin infusion directly, as the cervical ripening effect of prostaglandins is less critical.

How to Approach the Question

First, identify the clinical context: the patient has an intrauterine fetal death (IUFD) and requires labor induction.
The question asks for the 'first-line' medication. This implies the standard, initial treatment for this specific condition.
Analyze the function of each medication option in an obstetric setting.
Eliminate Terbutaline, as it is a tocolytic used to stop labor, which is the opposite of the goal.
Eliminate Magnesium Sulphate, as its primary roles are seizure prevention and neuroprotection, not induction.
Compare 'Oxytocin only' with 'Misoprostol and prostaglandin'. Recall that induction, especially with an unfavorable cervix (common in IUFD), requires cervical ripening first. Prostaglandins (like Misoprostol) are the primary agents for this dual purpose of ripening and contracting.

Concept Tested & Keywords

Concept Tested: Pharmacological management of labor induction for intrauterine fetal death (IUFD).
Stem keywords: first-line medication, labour induction, intrauterine foetal death
Lead-in keywords: Which
Negative lead-in flag: false

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