Baby in the mother’s tummy used to lying in a position, lying down to sleep so that the baby has a sense of security, so a month of the baby is allowed to sleep on his back, because the benefits of sleeping on his back is very much. First, the baby can sleep more solidly. Second, you can avoid the baby kicking the quilt, thus protecting the baby’s abdomen and reducing the chances of the baby getting cold. Third, you can exercise the baby’s arm strength and cardiorespiratory function, because when the baby sleeps on his back need to rely on the strength of the arms to change the direction of the head, but also exercise the baby’s cardiorespiratory function, can make the baby grow faster and stronger. Fourth, sleep on your stomach can not be afraid of baby sleep overflow, if overflow, because sleeping on your stomach will be easy to flow, and not easy to choke and cough. Fifth, if the baby sleeps on his back can reduce the occurrence of the baby’s head. But sleeping on your back also needs to pay attention to some details, because sleeping on your back needs to be under the close supervision of parents to let the baby sleep on his back, sleep on his back when you need to take away some of the extra clothes around the baby’s head, in order to avoid making the baby suffocation.