It is possible that a six-month-old baby who can’t roll over is normal. 1. Normal: 6 months of the baby will not roll over, it may be normal, because each baby’s growth and development is not the same, for the coordination of movement will be different, so the baby to learn to roll over time may be delayed; in addition to the baby’s physique is relatively obese, will also affect the baby turn over the action. 2. abnormal: baby if not yet born before, in the mother’s stomach inside already exists intrauterine hypoxia or delivery process has a history of neonatal asphyxia, then it may lead to the baby’s central nerve cell damage. If your baby can’t roll over at 6 months, you need to pay attention to whether your baby is usually unresponsive, and if so, it’s probably because your baby has a combination of central nervous system disorders. Parents should bring their babies to the hospital for regular checkups, and consult a specialist if your baby is still unable to roll over at 6 months of age.