Induction of labor with intravaginal misoprostol in intrauterine fetal death

Abstract

Objective: Our purpose was to evaluate the effectiveness and safety of intravaginal misoprostol for the induction of labor in intrauterine fetal death.

Study design: Seventy-two women at 18 to 40 weeks of pregnancy with intrauterine fetal death, without abdominal scars, were treated with 100 micrograms of intravaginal misoprostol. The dose was repeated every 12 hours until effective uterine contractions and cervical dilatation were obtained, for up to 48 hours.

Results: The mean time from induction to delivery was 12.6 hours, and only six patients (8%) required between 24 and 48 hours, at the end of which all patients had been delivered. Only the Bishop's score was significantly associated with time from first dose to expulsion. No surgical procedure was required. Hypercontractility, sweating, fever, diarrhea, or other gastrointestinal effects were not detected. There was no need for analgesics.

Conclusions: Intravaginal misoprostol at the dose of 100 micrograms every 12 hours appears to be a safe, effective, practical, and inexpensive new method for induction of labor in intrauterine fetal death.

PIP: Physicians at the Maputo Central Hospital in Mozambique inserted at least 100 mcg misoprostol into the vaginas of 72 women with intrauterine fetal death at 18-40 weeks pregnancy to induce labor. They inserted another dose every 12 hours up to 48 hours if a patient had not begun labor. The mean time between induction of labor to delivery stood at 12.6 hours. 92% delivered within 24 hours. All had delivered by 48 hours. The time between 1st dose and expulsion was significantly lower for women with a Bishop's score of more than 5 than for those with a score of 5 and lower (7.6 vs. 13.7 hours; p = .028). Bishop's score was the only variable associated with time to expulsion. (It is used to estimate the prospects of labor by evaluating the extent of cervical dilatation, effacement, station of the head, consistency of the cervix, and cervical position in relation to the vaginal axis.) No one died, needed surgery either before or after delivery, or suffered side effects. The physicians noted that this regimen greatly reduced costs, staff workload, and time. These findings suggest that intravaginal misoprostol at a dose of 100 mcg/12 hours is a safe, effective, practical, and inexpensive new way to induce labor in cases of intrauterine fetal death.