Generally, newborns can learn to roll over at about 4 months of age. Usually after 4-5 months the baby’s bones gradually harden and the muscles of the neck can support the head and begin to try to roll over. Turning over is the performance of the baby’s limb coordination ability, if the baby’s limb coordination ability is better, turning over may be earlier. Some babies with poor physical condition and delayed development may delay turning over until after 5 months of age; if the baby wears more clothes, it may also affect turning over, resulting in turning over later. In addition, the time for babies to learn to turn over is related to diet and nutrition, development speed, and parental teaching. Usually pay attention to nutritional supplements, appropriate calcium, to promote the baby’s bone development, improve the bone strength needed to turn over, on the basis of this can be taught from more than 3 months, using toys to lure the baby, then about 4 months may turn over. If parents do not teach, it may be 1-2 months later. If the baby is delayed in turning over or continues not to turn over, it suggests the possibility of neurological problems and should be promptly evaluated at the hospital. In addition, if possible, you can let your baby get some sunshine outdoors to promote calcium and vitamin D absorption, help turn over and promote growth and development.