It is relatively normal for a child to not roll over at five months of age, but it cannot be ruled out. Need to combine with the child’s other performance, for each child there will be some individual differences, some may occur early some may be late. 1. Normal: 5 months baby will not turn over may be due to their own weight is too high, usually lack of exercise caused by parents can help the baby to practice turning over, may also be due to the baby’s nutritional deficiencies caused by physical weakness, caused by the phenomenon of turning over late, to the baby to add rice paste and other complementary foods, supplemental nutrition. 2. abnormal: if has not been able to roll over, and not specific other big movement, such as can not sit, etc., then consider may belong to the pathological problems, such as neurodevelopmental abnormality caused by, this case need to go to the hospital for further examination, to clarify the cause. In addition, it may also be due to the child lying in the place is too soft, not conducive to turn over, parents can usually guide the child to turn over, in general, there is no big problem. If the child turn over the problem can not be effectively improved, it is recommended to consult the doctor as far as possible, after a clear diagnosis for targeted treatment.