Misoprostol is a cytoprotective prostaglandin PGE1 analogue.
Reference:
1.Second Trimester Medical Termination of Pregnancy with Combined Intracervical and Intravaginal Misoprostol: Comparative Analysis with Intravaginal Misoprostol—A Pilot Study
The authors in this study selected a dose of 600 lg for intravaginal misoprostol for the control group, as this is the dose commonly employed for second trimester termination of pregnancy