In plain words
Membrane sweeping is a procedure done during a cervical exam near the due date. A provider gently separates the membranes from the cervix with a gloved finger. This can release natural substances that prepare the cervix, and it may start contractions. It is one way to try to begin labor without a medicine. Many people feel cramping, pressure, or spotting afterward. Many people do not go into labor right away. Whether it helps depends on how far along you are and how ready your cervix is. Ask your provider about the benefits and risks for you.
The deeper version
Membrane sweeping, or , is the digital separation of the chorioamniotic membranes from the lower uterine segment during a vaginal examination, usually done near or past term. It acts by releasing local (PGF2-alpha and PGE2) from and membranes, and by mechanical cervical stimulation, the . Boulvain and colleagues (Cochrane Database of Systematic Reviews, 2005) found sweeping associated with more spontaneous labor, fewer formal inductions, and fewer pregnancies continuing beyond , with more vaginal bleeding and discomfort. ACOG Practice Bulletin 107 (2009) discusses sweeping within its guidance. Effect sizes are modest and depend on cervical readiness. The controversy concerns whether the benefit justifies routine offering.
Where it comes up
- Going past your due datePregnancy: Your Body
- Induction: why, how, and what to askGetting Ready for Birth
- Signs labor is startingGetting Ready for Birth
What mothers here say about membrane sweeping
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Sources
- Boulvain M and colleagues — Membrane sweeping for induction of labour, Cochrane Database of Systematic Reviews (2005)
- American College of Obstetricians and Gynecologists — Practice Bulletin 107: Induction of Labor (2009)