Newborns lying on the mother’s chest is usually no more than 30 minutes at a time, need to change positions in a timely manner, otherwise it is easy to increase the risk of suffocation. Newborns lying on the mother’s chest, help to appease the baby, give the baby a sense of security, the baby is easier to fall asleep, sleep will be more solid, the baby lying on the mother can also promote mother and child affectionate communication, while the baby lying on the back to exercise the neck, chest and back, as well as limb muscles, the benefits of a lot. But the baby lying on his back for a long time to sleep, easy to cause blockage of the mouth and nose, resulting in the risk of suffocation, the baby’s health is not favorable, so it is recommended that each time no more than 30 minutes, need to change the position in a timely manner. Therefore, it is best not to let the baby lying on the mother’s chest for a long time.