What should you know about breaking water to start labor?

A midwife or obstetrician makes a small opening in the amniotic sac during a vaginal examination. It should be offered only after discussing why it is being considered, the alternatives, and what may happen next.

Amniotomy is usually considered when the cervix has opened enough for the clinician to reach the membranes and the baby's head is positioned low enough for the procedure to be appropriate. A sterile instrument is used to make an opening, allowing amniotic fluid to drain.

You may feel pressure from the examination and then a warm gush or continued trickle of fluid. The procedure itself does not cut the baby. Contractions may become stronger afterward, although labour may not begin or progress as hoped and other induction methods may still be discussed.

Before agreeing, ask what clinical finding makes amniotomy suitable now and whether waiting or using medication is an option. Tell the maternity team about bleeding, unusual pain, fever, a previous caesarean birth, or any concern about your baby's movements.

The team commonly checks the baby's heart rate around the procedure and observes the colour and smell of the fluid. Once the sac is open, it cannot be resealed. Follow your unit's advice about movement, washing, eating, pain relief, and the plan if contractions do not establish.

Contact your maternity unit urgently if your waters break at home before labour, especially before your due period, because you and your baby may need assessment for preterm labour or infection. Note when the leaking began and the fluid's colour and smell, but do not delay care to monitor it yourself.

Seek immediate help for heavy bleeding, severe or constant abdominal pain, fever or chills, green or brown fluid, reduced baby movements, or something that feels like a cord in the vagina. If a cord is visible or felt, call emergency services, avoid pushing it back, and follow the emergency operator's positioning instructions.

Useful questions include: What is the goal of breaking my waters now? How is my baby's position checked? What monitoring will I have? What are my alternatives? What are the next options if labour does not progress? Also ask how the plan may change if the fluid contains meconium or the baby's heart-rate pattern becomes concerning.