Around the six month mark, an infant can usually roll over in both directions, from stomach to back and back to stomach. Typically developing infants tend to roll from their stomachs to their backs before they can roll from their backs to their stomachs because doing so requires more coordination and strength. At this stage of development, infants are also expected to begin sitting without support and to support their weight when held in a standing position. You may even notice that an infant will bounce when held in a standing position. During this stage of development, infants may rock back and forth and begin to scoot backwards.
If at this stage of development an infant is unable to roll over, seems stiff with tight muscles or seems floppy like a rag doll, nannies should mention their observations to the parents and encourage them to share this information with the child’s pediatrician.