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Sweep membranes1/9/2024 ![]() ![]() There was no difference in rates of cesarean delivery or serious maternal-fetal events compared with no intervention, prostaglandin administration, or oxytocin administration, although patients who underwent membrane sweeping had more minor bleeding and irregular contractions. For most women, labor starts within 48 hours after a membrane sweep. ![]() Every pregnancy is different and the duration between stripping of membranes (membrane sweep) and initiation of labor varies among women. After membrane sweeping, fewer patients were undelivered after 48 hours (five trials N = 726 RR = 0.77 95% CI, 0.70 to 0.84), after one week (nine trials N = 1,375 RR = 0.71 95% CI, 0.65 to 0.78), by 41 weeks' gestation (six trials N = 937 RR = 0.59 95% CI, 0.46 to 0.74), and by 42 weeks' gestation (six trials N = 722 RR = 0.28 95% CI, 0.15 to 0.50). After stripping the membranes (membrane sweep) most women begin labor within 48 hours. Time to spontaneous delivery was 2.5 days shorter in the intervention group (10 trials N = 1,580 mean difference = −2.5 95% confidence interval, −3.0 to −2.0), and there was a decreased need for formal labor induction (12 trials N = 1,493 risk ratio = 0.28 95% CI, 0.15 to 0.5). 1 Sweeping was primarily compared with no intervention, although several small trials compared it with prostaglandin or oxytocin (Pitocin) administration. A 2005 Cochrane review evaluated membrane sweeping for induction of labor in 22 RCTs with a total of 2,797 pregnant women at term. It involves inserting a finger into the cervical os and sweeping it circumferentially to separate the fetal membranes from the uterus. A vaginal examination for membrane sweeping should then be offered to women and birthing people who have not birthed by 41 weeks (40 weeks if nulliparous) (NICE. Membrane sweeping or stripping is routinely used in late pregnancy.
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