You will typically enter the tub during active labor — around 5-6 centimeters dilated. Entering too early can slow contractions. The water temperature is kept at 97-100°F, close to body temperature, and monitored throughout.
Once in the water, many women experience immediate pain relief. You can move freely, changing positions between contractions. Kneeling, squatting, and side-lying are all possible in a birth tub. Your provider will monitor the baby's heart rate using a waterproof Doppler device.
During pushing, you will follow your body's cues. Your provider guides the baby out as they would for any vaginal delivery — just underwater. Once born, the baby is gently brought to the surface and placed on your chest for skin-to-skin contact. Babies do not breathe underwater — the dive reflex prevents inhalation until the face contacts air.
You will typically exit the tub for delivery of the placenta, though some women deliver the placenta in the water as well. Your provider will examine you for any perineal tearing and assess blood loss once you are out of the water.