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Aim: To evaluate the efficacy and safety of oral misoprostol for labor induction in women with term premature rupture of membranes (PROM) and an unfavorable cervix. Methods: We randomized 130 women with PROM of ≤4 h to either oral misoprostol, 50 μg, or a placebo given every 4 h for up to three doses. Intravenous oxytocin was initiated if active labor did not begin within 12 h. Results: Sixty-four women received oral misoprostol and 66 received placebo. The PROM-to-delivery interval was shorter with misoprostol than with placebo (13.7±5.8 vs. 20.3±6.8 h, respectively, P<0.05). Misoprostol significantly reduced the need for oxytocin (28.1 vs. 72.7%, P<0.001) and antibiotics (25 vs. 69.7%, P<0.001). No significant differences in cesarean section or hyperstimulation rate were noted. Conclusion: Oral misoprostol given to women with unfavorable cervix soon after term PROM significantly reduces the induction-to-delivery time and the need for oxytocin and antibiotics. [ABSTRACT FROM AUTHOR]