A randomized comparison between misoprostol and dinoprostone for cervical ripening and labor induction in patients with unfavorable cervices

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Abstract
To compare the efficacy and safety of two prostaglandin derivatives, misoprostol and dinoprostone, for ripening the cervix and inducing labor in women with an unfavorable cervix. One hundred fifty-five women admitted for induction of labor to St. John's Mercy Medical Center, a teaching community hospital, were randomized to one of two methods: intravaginal misoprostol, 50 μg every 4 hours up to three doses (n = 76); and intracervical dinoprostone gel, 0.5 mg every 6 hours up to three doses (n = 79). Misoprostol was more effective than dinoprostone in causing cervical ripening (P = .01), inducing labor (P < .001), shortening the duration of labor (P < .001), and decreasing the need for oxytocin augmentation (P < .001). Nonreassuring fetal heart monitoring patterns associated with hyperstimulation were significantly more frequent (P < .001), and the incidence of cesarean deliveries because of this indication was significantly higher (P = .002) in patients receiving misoprostol. Misoprostol is an effective agent for cervical ripening and labor induction, but it causes an increase in cesarean deliveries associated with uterine hyperstimulation.

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