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To strip the membranes your cervix must already be dilated. It can have some effect to trigger labor. Most doctors prefer to induce by 41 weeks or certainly by 42 weeks to avoid the complications of postterm pregnancy.
Stripping the membranes is a fairly simple procedure. The doctor gives you a vaginal examination by placing a gloved finger through the cervix and sweeps the amniotic membranes free of their attachment to the lower part of the uterine cavity.