Glossary: Terms Starting with "W"

Water breaking is the common term for rupture of membranes, when the amniotic sac that surrounds your baby tears and releases amniotic fluid. This can feel like a sudden gush or a slow, steady trickle. It may happen on its own during active labor, or your doctor may break it deliberately to speed things along. If your membranes rupture before contractions begin, labor usually follows within hours. You should note the time, color, and smell of the fluid. Clear or pale yellow fluid is normal, but green or brown fluid may signal meconium and requires immediate medical attention.

Related: ROM, amniotic fluid

A water birth involves laboring in a warm-water pool and, if all goes smoothly, delivering your baby while still in the water. The warmth relaxes muscles, eases contraction pain, and supports your weight so you can move into comfortable positions. Babies transition gently from the amniotic fluid environment and take their first breath only once lifted to the surface. Water births require continuous monitoring and a midwife present throughout. They are only suitable for low-risk pregnancies with no complications. If any concerns arise, you will be asked to leave the pool promptly for safer management.

Related: Water immersion, birth pool

Water immersion means spending part of your active labor in a warm bath or birthing pool without necessarily giving birth in the water. The buoyancy reduces the pressure on your joints and pelvis, while the warmth relaxes tense muscles and can slow the release of stress hormones, making contractions feel more manageable. Studies show water immersion in the first stage of labor reduces the need for epidurals and shortens labor duration for some women. You can enter the water once active labor is established, usually around 5 to 6 centimeters dilated. You are free to leave the pool at any time and switch to other pain relief.

Related: Water birth, bath