Sweeping of the membranes versus uterine stimulation by oxytocin in nulliparous women. A randomized controlled trial

Abstract

The aim of this study was to evaluate whether sweeping of the membranes at term could shorten the length of pregnancy and reduce the incidence of postterm pregnancies. We randomly selected 104 nulliparas with uncomplicated pregnancy and gestational age between 281 and 287 days. Our patients were divided into three groups. Group A consisted of 34 women who were subjected to sweeping of the membranes. Uterine stimulation with oxytocin was applied in 35 women (group B), and 35 women (group C) were used as a control group. We had no significant reduction of the time interval from sweeping of the membranes until delivery (1.9 +/- 1.2 days), compared to that of group B (2.1 +/- 0.8 days) as well as that of the control group (2.5 +/- 0.9 days). The incidence of spontaneous labor in patients after sweeping of the membranes was greater (67.6%) when compared with oxytocin-stimulated patients and the control group (p < 0.05). Furthermore, a better Bishop score was noted in patients of group A. No statistically significant difference was noted in the mode of delivery between the groups, but sweeping of the membranes significantly decreased the incidence of postterm pregnancies (p < 0. 05). We concluded that sweeping of the membranes is an effective method for initiating labor in women with a gestational age between 40 and 41 weeks, thus reducing the need for induction.