Sweeping membranes once at 38-40 weeks' gestation does not significantly increase the proportion of women who begin spontaneous labor within 7 days. 008), using logistic regression to control for potential confounders. 008) and the overall spontaneous labor rate (P =. 003), and gestational age at enrollment predicted spontaneous labor before 41 weeks (P =. In this MD variant the gas temperature and its hydrostatic pressure are kept below those of the feed aqueous solution. The Bishop score predicted spontaneous labor within 7 days (P =. Sweeping gas membrane distillation (SGMD): A gas, such as air or nitrogen, sweeps the permeate side of the membrane carrying the evaporated molecules outside the membrane module for condensation. 66) or the overall spontaneous labor rate (P =. 39) or in the secondary outcomes of spontaneous labor before 41 weeks (P =.

There were no differences between the groups in the primary outcome of spontaneous labor within 7 days (33% sweeping, 38% control P =. The subjects were demographically similar between the groups. The sample size was calculated based on doubling of the spontaneous labor rate within 7 days from 28% to 56% (alpha = 0.05, beta = 0.10). Other outcomes included maternal and neonatal morbidity. Major secondary outcomes included the spontaneous labor rate before 41 weeks and the overall spontaneous labor rate.

The primary outcome was the rate of spontaneous labor within 7 days. One hundred fifty antenatal low-risk patients at 38-40 weeks' gestation were assigned randomly to sweeping or control (ie, Bishop score only) groups and stratified based on the ability to pass a finger through the internal os.

To determine whether sweeping or stripping membranes at 38-40 weeks' gestation leads to spontaneous labor within 7 days.

Sweep the membranes