It is normal for babies to be unable to roll over at 5 months. There are individual differences in the growth and development of babies. In general, most babies will turn over skillfully at 7 months of age and can sit alone for a long time, unconsciously making sounds such as “Daddy” and “Mommy”. However, some babies grow and develop early and may be able to roll over at 5 months of age, while those who develop later may not be able to roll over until 8 or 9 months of age. Generally 5-month-old babies can stand up straight with their armpits, can distinguish human voices, reach for things, etc. Some are even sensitive to slight changes in the taste of food. There are individual differences in the growth and development of babies, some develop early, some develop late, if you don’t understand whether it is normal or not, you can go to the hospital to clarify the situation.