Newborn babies can sleep on their backs, newborn babies sleep on their backs have the following advantages: 1, not easy to vomit, peristalsis and digestion of the stomach is beneficial. Because of the special structure of the baby’s stomach towards, sleep on your back can make the stomach contents are not easy to flow to the esophagus and mouth, can move to the small intestine, conducive to gastrointestinal digestion and absorption. 2, exercise lung function, because the diaphragm contraction action in the abdomen side more, sleep on your back when the blood flow of the lungs and gas exchange can maintain a balance, when the function of breathing is most ideal. 3, can make the face become narrow and long, baby left and right to replace the sleep on your back, can make the baby’s head more round and long. 4, cure hiccups, babies will eat milk with the milk swallowed air, sleep on your stomach can relieve the baby hiccups. Although newborns can sleep on their backs, but the baby sleep on their backs must be half an hour after eating milk, and only under the supervision of adults.