Once your water breaks, most hospitals aim to have your baby delivered within 24 hours. The risk of infection for both you and your baby increases the longer the membranes stay ruptured, and research suggests that starting labor sooner rather than later leads to better outcomes. About 64% of women whose water breaks before labor starts will go into labor naturally within 24 hours, but many providers won’t wait that long to intervene.
The 12 to 24 Hour Window
A large study published in the American Journal of Obstetrics & Gynecology found that immediate induction after the water breaks is the best strategy for reducing complications for both mother and baby. When immediate induction isn’t possible, starting labor within the first 15 to 20 hours still produces significantly better outcomes than simply waiting. After 12 hours of ruptured membranes, the risk of uterine infection roughly doubles compared to shorter durations. By 16 hours, the risk of a postpartum uterine infection also rises substantially.
This is why most hospitals treat 24 hours as an outer limit at full term. Some providers prefer to start induction much earlier, sometimes within just a few hours, especially if there are other risk factors like a positive test for Group B strep bacteria.
Why Infection Risk Rises Over Time
The amniotic sac is a sterile barrier protecting your baby. Once it ruptures, bacteria from the vagina can travel upward into the uterus. The longer this pathway stays open, the greater the chance of infection. The most common concern is chorioamnionitis, an infection of the membranes and amniotic fluid that can cause fever, rapid heart rate, and uterine tenderness in the mother.
For newborns, prolonged membrane rupture is a risk factor for early-onset sepsis and pneumonia. A multi-center study found that babies born after premature membrane rupture had nearly twice the overall risk of neonatal infectious disease compared to babies whose membranes stayed intact until delivery. The risk of early-onset sepsis was dramatically higher, reinforcing why providers monitor closely once the water has broken.
When Water Breaks Before 37 Weeks
If your water breaks before 37 weeks, the situation is more complex. This is called preterm premature rupture of membranes, and the approach is very different from what happens at full term. Before 34 weeks, providers often try to delay delivery to give the baby more time to develop, using antibiotics to reduce infection risk and steroids to help the baby’s lungs mature faster. Historically, the target was to deliver at 34 weeks, but current guidelines allow for shared decision-making between you and your provider about whether to continue waiting beyond that point.
In these cases, you may be hospitalized for days or even weeks with careful monitoring of your temperature, blood work, and the baby’s heart rate. The trade-off is straightforward: every extra day in the womb helps the baby grow, but every extra day also increases infection risk. Your medical team will weigh these factors based on how far along you are and how you and the baby are doing.
How Providers Start Labor After Water Breaks
If contractions don’t begin on their own, your provider will start an induction. Research comparing different approaches found that using a synthetic hormone drip (the same hormone your body produces naturally to trigger contractions) resulted in faster deliveries than other methods. Women induced this way delivered in a median of about 15 hours, compared to nearly 26 hours with alternative approaches. Vaginal delivery rates were slightly higher too, at 86% versus 82%, with no increased risk of cesarean section regardless of whether it was a first pregnancy or whether the cervix had begun to dilate.
How to Tell If Your Water Actually Broke
One of the trickiest parts is figuring out whether your water has truly broken. Amniotic fluid is mostly clear or light yellow and has no smell. Urine, by contrast, is darker yellow and has a noticeable odor. The key difference is that you can’t stop amniotic fluid from leaking. If you try to “hold it” and the fluid keeps coming, especially in small gushes with movement or contractions, it’s likely amniotic fluid rather than urine.
Sometimes the rupture is dramatic, a large gush of fluid that soaks through clothing. Other times it’s a slow, steady trickle that’s easy to confuse with vaginal discharge or a leaky bladder. Only a provider can confirm it with a vaginal exam using special paper that changes color on contact with amniotic fluid. If you’re unsure, call your provider or go to the hospital. Getting checked is always reasonable, and a false alarm is far better than staying home with ruptured membranes.
What to Do (and Avoid) While You Wait
Once your water breaks, the priority is keeping bacteria away from the open pathway to your uterus. Do not have sexual intercourse, do not use tampons, and do not go swimming or take a bath. You can use a pad to absorb the fluid. Note the time your water broke, the color of the fluid, and any odor, because your provider will ask about all of these.
Clear or pale yellow fluid is normal. Fluid that’s green or brown may contain meconium (the baby’s first stool), which your provider needs to know about. Fluid that smells foul could indicate an existing infection. In any of these cases, head to the hospital promptly rather than waiting to see if contractions start.
Most women are told to come in within a few hours of their water breaking even if they feel fine and contractions haven’t started. Your provider will assess the baby’s position, check for signs of infection, and discuss the plan for delivery based on how far along you are and whether labor is progressing on its own.