The gravity attraction of the ball can reduce the labor pain of the expectant mother, reduce the chance of cesarean section and the use of forceps, and can effectively make the expectant mother difficult to breathe, prompting the expectant mother to find a position that can reduce the pain, so try to sit, squat or kneel, All are beneficial to the delivery of the baby and reduce dystocia. At the same time, since the baby is in the birth canal… In many people\’s traditional beliefs, expectant mothers undoubtedly give birth in the supine position. However, this posture, which has been used for many years, is not suitable for every expectant mother. In recent years, more natural childbirth