Advantages of water birth include pain relief, shorter labor, and energy savings, while disadvantages include lack of popularity, high cost, and potential risks. The advantages are that warm water can help relax the emotions and muscles, reduce pain and anxiety during labor, reduce the risk of tearing of the birth canal and perineum, and speed up the process of labor; and the buoyancy of water can help women save physical strength. Underwater delivery is only available to women who meet the conditions for normal labor, which is relatively demanding for women, and because the equipment needs to be professionally supported, it is expensive and not popular; the cervix is in a dilated state, so both the newborn and the mother may be infected; and because of the dilution of the water, it is difficult to judge the amount of bleeding during the delivery process. If you want to choose underwater delivery, you need to be evaluated by a professional doctor according to the situation of the mother and the fetus, and fully communicate with the doctor to understand the pros and cons before deciding.