A water birth means delivering your baby while immersed in a tub or pool of warm water. The process requires specific preparation, the right water temperature, good timing for when you get in the pool, and awareness of both the benefits and risks. Whether you’re planning a water birth at home or in a birth center, here’s what you need to know to prepare.
When to Get in the Water
Timing matters more than most people realize. Getting into the pool too early can slow your contractions, while waiting too long may mean you miss the window where water immersion helps most. Most midwives recommend entering the birth pool once you’re in active labor, typically when your cervix has dilated to about 5 or 6 centimeters. At this stage, the warm water can help relax your muscles and ease pain without interfering with the progress of labor.
Some practitioners suggest laboring in the water during the first stage (the dilation phase) and then getting out for the actual delivery. Others support staying in through delivery. This is a conversation to have with your midwife or provider well before labor begins, since their comfort level and experience with underwater delivery will shape your options.
Getting the Water Temperature Right
The water needs to stay below 100.4°F (38°C). This threshold exists to prevent overheating in both you and the baby, since fetal hyperthermia can cause distress. Texas Midwifery Board guidelines specify that water temperature should be checked before you get in, after adding any water, and periodically throughout labor.
In practice, most people find water between 95°F and 100°F comfortable. A floating thermometer is essential, not optional. As labor progresses and the pool cools, you or your birth partner will need to add warm water to maintain the temperature. Keep the thermometer visible and check it frequently.
Equipment You’ll Need
If you’re planning a water birth at home, you’ll need to gather supplies ahead of time. Based on clinical checklists from Perinatal Services BC, the essentials include:
- Birth pool: Purpose-built inflatable birth pools are deeper and wider than a standard bathtub, giving you room to move and change positions.
- Disposable pool liner: Required if you’re renting or borrowing a pool to prevent cross-contamination.
- Floating thermometer: For continuous water temperature monitoring.
- New hose and tap adapter: To fill the pool from your home’s water supply. A new hose avoids bacteria that accumulate in garden hoses.
- Debris net: A small handheld net (like a fish tank net) to skim the water. During the pushing phase, it’s normal and expected to pass some stool, and the net keeps the water clean.
- Extra towels: More than you think you’ll need, for drying off, keeping warm, and cleanup.
- Plastic drop sheet: To protect your floors from splashing and overflow.
Do a trial run filling the pool a few weeks before your due date. You need to know how long it takes to fill (often 30 to 45 minutes), whether your hot water heater can handle it, and whether the hose adapter fits your faucet. Some people boil extra water on the stove as backup.
What Happens During the Birth
Once you’re in the pool during active labor, you’ll likely find that buoyancy makes it easier to shift between positions. Many people kneel, squat, or lean forward against the pool wall. Your midwife will monitor the baby’s heart rate using a waterproof Doppler device held against your belly beneath the water’s surface.
When the baby is born, they are brought gently to the surface. Newborns don’t typically inhale water because they’re still receiving oxygen through the umbilical cord, and a reflex called the dive reflex inhibits breathing while submerged. The baby is lifted out of the water within moments of delivery, the cord is clamped and cut, and skin-to-skin contact begins just as it would in a land birth. The placenta is usually delivered outside the pool.
How Clean Is the Water, Really?
One concern people have is whether the pool water becomes contaminated during labor and whether that puts the baby at risk. A study of over 1,200 water births published in Gynäkologisch-geburtshilfliche Rundschau tested pool water at two stages: before labor and after delivery. Before labor, the water already contained bacteria from the plumbing, including Legionella in 29% of samples and Pseudomonas aeruginosa in 22%. After delivery, contamination from gut bacteria spiked, with E. coli found in 58% of samples.
Despite this, the babies born in water did not have higher infection rates. Only 1.15% of water-born babies (14 out of 1,215) needed antibiotics for suspected infection, compared to 2.3% of babies born on land (19 out of 817). The takeaway isn’t that contamination doesn’t matter, but that with proper management and a healthy pregnancy, the baby’s exposure to these bacteria during the brief delivery period doesn’t translate into a meaningful infection risk.
Risks to Be Aware Of
Water birth is not risk-free. The most well-documented specific complication is umbilical cord avulsion, where the cord snaps before it can be clamped. A large safety study from Oregon State University found that water births had 20 additional cord avulsions per 10,000 births compared to land births. This can cause bleeding, but the same study found no infant deaths from cord avulsions and actually 26 fewer infant hospitalizations per 10,000 water births overall. Midwives experienced with water birth know to handle the cord carefully and bring the baby to the surface slowly to reduce tension on it.
Other potential risks include difficulty estimating blood loss in murky water, challenges with emergency intervention if complications arise suddenly, and rare cases of the baby inhaling water if brought to the surface and re-submerged. These risks are largely managed by having an experienced provider and a clear plan for getting out of the pool quickly if needed.
Who Should Not Have a Water Birth
Water birth is generally reserved for low-risk, full-term pregnancies. You’ll typically be advised against it if you have preterm labor (before 37 weeks), a breech baby, twins or multiples, a history of complicated delivery, active infection such as herpes or hepatitis, preeclampsia, or if you need continuous electronic fetal monitoring. Heavy bleeding during labor or the need for labor-augmenting medications also rules it out, since these situations require closer medical intervention than a birth pool allows.
Your provider will assess your eligibility as your due date approaches. Even if you plan a water birth, circumstances during labor can change. Having a backup plan for delivering on land is part of responsible preparation, not a sign of failure.
Choosing Where to Have a Water Birth
Your three main options are a freestanding birth center, a hospital with water birth facilities, or your home. Birth centers are the most common setting, since they’re designed for low-intervention births and typically have built-in tubs with proper plumbing and drainage. Some hospitals now offer water birth, though availability varies widely by region and often depends on individual provider willingness.
Home births require the most preparation on your part, from sourcing and setting up the pool to ensuring your space can handle the water weight (a filled birth pool can weigh over 500 pounds) and that you have adequate hot water supply. Wherever you plan to deliver, confirm early in your pregnancy that your provider has specific experience attending water births, not just a general willingness to try one.