Intracervical misoprostol and prostaglandin E2 for labor induction

Chang, Y.-K.; Chen, W.-H.; Yu, M.-H.; Liu, H.-S.
January 2003
International Journal of Gynecology & Obstetrics;Jan2003, Vol. 80 Issue 1, p23
Academic Journal
journal article
Objectives: To compare the safety and efficacy of misoprostol with PGE2 for induction of labor by intracervical administration. Methods: Eighty-six women with indications for labor induction at term were randomly assigned to two groups. Each woman received either 50 μg of misoprostol or 0.5 mg of prostaglandin E2 intracervically. If labor was not initiated after 4 h, the same dose was repeated every 4 h to a maximum of 200 μg of misoprostol or 1.5 mg of PGE2 until adequate labor was achieved. Results: Forty-three women were allocated to the misoprostol group and 43 to the prostaglandin E2 group. Misoprostol was more effective than PGE2 in producing cervical changes (P<0.025). Delivery within 12 h after the first administration occurred more often in the misoprostol group than in the PGE2 one (85% vs. 56%, P<0.05). Less patients in the misoprostol group required oxytocin augmentation than in the PGE2 one (16.3% vs. 39.5%, P<0.05). Uterine tachysystole and hyperstimulation occurred more frequently in the misoprostol group (44.1%) than in the PGE2 group (18.7%) (P<0.05). Nevertheless, no statistically significant differences were noted between the two groups including mode of delivery and neonatal or maternal adverse outcome. The interval from induction to vaginal delivery was significantly shorter in the misoprostol group (480±172 min vs. 657±436 min, P<0.01). Conclusions: Compared with prostaglandin E2, intracervical misoprostol is more effective in cervical ripening and labor induction at term. The higher frequency of uterine hypercontractility associated with the use of misoprostol did not increase the risk of adverse intrapartum and neonatal outcomes.


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