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Dosing interval between mifepristone and misoprostol in second and third trimester termination
Natalia Prodan1, Julia Breisch1, Markus Hoopmann1
1Department of Obstetrics and Gynaecology, University of Tuebingen, Calwerstrasse 7, 72076, Tübingen, Germany.
Archives of Gynecology and Obstetrics
|December 23, 2018
Summary
A one-day interval between mifepristone and misoprostol effectively accelerates labor induction for second and third trimester termination of pregnancy (TOP). This strategy significantly reduces the time to delivery compared to other regimens.
Area of Science:
- Reproductive Medicine
- Obstetrics and Gynecology
Background:
- Second and third-trimester termination of pregnancy (TOP) often requires labor induction.
- Various medication regimens, including misoprostol and mifepristone, are used to induce labor.
- Optimizing the timing of medication administration is crucial for efficient TOP.
Purpose of the Study:
- To compare the effectiveness of different labor induction strategies using misoprostol and mifepristone for second and third-trimester TOP.
- To determine the optimal interval between mifepristone and misoprostol administration to accelerate delivery time.
Main Methods:
- Retrospective study of 481 pregnancies undergoing second or third-trimester TOP due to fetal anomalies (2007-2017).
- Pregnancies were categorized based on medication regimens: misoprostol alone, mifepristone followed by same-day misoprostol, misoprostol 1 day after mifepristone, and misoprostol 2 days after mifepristone.
- Primary outcome: induction-to-delivery interval.
Main Results:
- A 1-day interval between mifepristone and misoprostol resulted in the shortest median induction-to-delivery time (9.3 hours).
- This regimen also achieved the highest proportion of pregnancy terminations within 24 hours (93.2%).
- Regimens involving mifepristone generally showed shorter delivery intervals compared to misoprostol alone.
Conclusions:
- Administering misoprostol one day after mifepristone is the most effective strategy for accelerating delivery in second and third-trimester TOP.
- This optimized regimen reduces the induction-to-abortion interval, improving clinical efficiency.
- The findings support a 1-day interval as a superior protocol for labor induction in these cases.
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