Babies can lie on their stomachs two or three days after birth, but not for too long. The baby can lie down two or three days after birth, but because the cervical spine development is not perfect, practice lying down, must pay attention to the baby’s safety, to avoid the baby can not raise his head caused by the inability to breathe or spit up milk caused by choking, lying down time should not be too long, usually 2 ~ 3 minutes can be. Practice lying down time and frequency, can gradually increase with the growth of the baby. Generally babies do not lie on their stomachs when they are hungry, and do not lie on their stomachs when they are prone to choking when they have just finished eating. In addition, do not lie down when sleeping at night, if the blocked nose and mouth is easy to cause suffocation. When the baby lying down, pay attention to observe the child’s condition, there is discomfort to seek medical attention.