It is recommended that newborns do not sleep on their stomachs for more than 2 hours. It is important to note that newborns should choose the prone sleeping position carefully to prevent sudden death of baby suffocation. In the short term, sleeping on the stomach can help lung development, but if it is more than 2 hours, you need to let the baby change the sleeping position to avoid pressure on the local tissues. As newborns just out of the mother’s body soon, many like to sleep on their stomachs like in the stomach, can get a sense of security. At the same time this will also have a certain role in promoting the development and maturation of the respiratory system. Baby sleeping on his back pay attention to the head around there can not be debris such as quilts, parents need to be closely guarded to avoid blocking the mouth and nose and cause suffocation. In 2 hours or so to change into the side position or supine position, so as not to long time lying on the back to sleep compression of the cheek. In addition, it is not recommended that babies sleep on their stomachs immediately after eating, otherwise it is easy to compress the stomach, causing spitting up and other phenomena.