by Madden SL


Premature rupture of membranes (PROM) at term is when the amniotic sac breaks before labor begins. The sac holds amniotic fluid and the growing baby. With PROM, the amniotic fluid inside the sac leaks or gushes out of the vagina. This is also known as your water breaking.

Fetus in the Amniotic Sac
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PROM is caused by membranes that are weak or thin.

Risk Factors

Things that may raise the risk of this problem are:

  • Being pregnant for the first time
  • PROM in earlier pregnancies
  • Premature contractions
  • First trimester bleeding
  • Chlamydia
  • Low body mass index


The main symptom of PROM is fluid leaking from the birth canal. There may be a sudden gush or a slow trickle.

PROM raises the risk of infection. There may also be:

  • Fever
  • Rapid heartbeat

Complications from PROM may be:


If a large amount of fluid is leaking from the birth canal, PROM is likely.

It can be hard to tell a slow amniotic trickle apart from urine. These tests may be done:

  • Nitrazine paper test—the doctor puts a small amount of fluid on a piece of paper to see if the fluid that is leaking is amniotic fluid
  • Microscopic exam of the fluid


Labor usually begins within hours after PROM. If labor does not begin, medicine may be given to start it.

The mother and baby will be watched closely to look for signs of any problems.


There are no known methods to prevent PROM.


American Pregnancy Association 

National Institute of Child Health and Development 


The Canadian Women's Health Network 

The Society of Obstetricians and Gynaecologists of Canada 


Placental abruption. EBSCO DynaMed website. Available at: Accessed March 8, 2022.

Prelabor rupture of membranes. The American College of Obstetricians and Gynecologists website. Available at: Accessed March 8, 2022.

Premature rupture of membranes at term (term PROM). EBSCO DynaMed website. Available at: Accessed March 8, 2022.

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