Comparing mifepristone and misoprostol to misoprostol alone for labor induction in nonviable second trimester pregnancies

Simultaneous Mifepristone and Misoprostol Versus Misoprostol Alone for Induction of Labor of Nonviable Second Trimester Pregnancy: a Pilot Randomized Controlled Trial

Phase 4 Interventional Washington University School of Medicine · NCT05322252

This study is testing if using mifepristone along with misoprostol can help women with nonviable second trimester pregnancies deliver faster than using misoprostol alone.

Quick facts

PhasePhase 4
Study typeInterventional
Enrollment30 (estimated)
Ages18 Years and up
SexFemale
SponsorWashington University School of Medicine Academic / other
Locations1 site (Saint Louis, Missouri)
Trial IDNCT05322252 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the effectiveness of administering mifepristone simultaneously with misoprostol for inducing labor in cases of nonviable second trimester pregnancies, compared to using misoprostol alone. The study aims to determine if this combined approach can reduce the total time from diagnosis to delivery, which is critical in minimizing maternal complications. Participants include women aged 18 and older, between 14 and 28 weeks of gestation, with a singleton nonviable fetus requiring labor induction. The trial is conducted at Barnes-Jewish Hospital in Saint Louis, Missouri.

Who should consider this trial

Good fit: Ideal candidates are women aged 18 and older, between 14 and 28 weeks of gestation, with a singleton nonviable fetus requiring induction of labor.

Not a fit: Patients who plan to undergo surgical evacuation or have contraindications to mifepristone or vaginal delivery may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the time to delivery for women facing nonviable pregnancies, thereby decreasing the risk of maternal complications.

How similar studies have performed: Previous studies have shown mixed results regarding the timing of mifepristone administration, making this approach a novel investigation in this specific context.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* 18 years or older
* 14 and 28 weeks' gestation
* Singleton gestation
* Nonviable fetus (i.e. fetal demise or previable gestational age/weight or lethal fetal anomaly)
* Requires induction of labor
* If fetal cardiac motion, abortion being performed for medical emergency per MO laws and consents completed

Exclusion Criteria:

* Contraindication to mifepristone
* Plan for surgical evacuation of uterus
* Contraindication to vaginal delivery
* Plan to initiate induction with any medication or device except misoprostol
* Declines participation

Where this trial is running

Saint Louis, Missouri

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Abortion, Second TrimesterPPROMRupture, SpontaneousFetal DemiseFetal DeathFetal Demise From MiscarriageFetal Death Before 22 Weeks With Retention of Dead FetusPregnancy Loss
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.