Artificial rupture of membranes (AROM)

Breaking the bag of waters with a small instrument.

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What is it

During a vaginal exam, a small plastic hook is used to make a tiny opening in the membranes, releasing amniotic fluid.

How your body works here

The amniotic sac normally cushions the baby's head and slowly bulges against the cervix during contractions. Rupturing it removes that cushion so the head presses directly on the cervix, and the sudden change in intrauterine pressure plus prostaglandin release from the exposed membranes usually intensifies contractions. It also starts a time window during which bacteria from the vagina can travel upward.

Benefits (B)
Risks (R)
Alternatives (A)
Run BRAIN with Labor LensGet Benefits, Risks, Alternatives, Intuition, and Nothing/Wait for Artificial rupture of membranes (AROM) — plus questions for your care team.
Evidence summary

Routine early AROM is not associated with clear benefit for all laboring people. Timing and reason matter; discuss with your team.

Sources
Questions to ask your provider
  • Why now? What's the goal?
  • What if I'd like to wait?
  • How long do you typically wait after rupture before recommending further steps?
Intuition & Nothing/Wait (the I and N in BRAIN)

What is your gut telling you? What happens if you do nothing or wait?

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