Case Series of Labor Induction inTwin Gestations with an IntrauterineBalloon Catheter

The efficacy and safety of labor induction using an intrauterine balloon catheter in twin pregnancies has been evaluated. During the study period (1992-1997), labor was induced at 36-42 weeks in 17 twin gestations. Labor induction was indicated for preeclampsia (n = 10), birth weight discordance (n = 3), suspected fetal distress (n = 2) and postdates (n = 2). Twin A was in vertex presentation in all cases. An intrauterine balloon catheter was inserted transcervically followed by augmentation whenever required. Vaginal delivery was achieved in 15 (88.2%) patients. The mean interval from balloon insertion to delivery was 17.05 h, with 80% deliveries occurring within 24 h of catheter insertion and 80% occurring within 12 h of catheter expulsion. Birth weight was 2,514+/-244 and 2,421+/-367 g for twin A and B, respectively. Oxytocin was required in 4 patients. Postpartum hemorrhage was noted in 1 patient. One patient with no progress of labor and 1 with suspected intrapartum fetal distress required cesarean section. All neonates had a 5-min Apgar score of 10. The data suggest that an intrauterine balloon catheter appears to be safe and effective to induce labor in twin gestations.