just that. my just about 7 mo old DS has stopped rolling for the last 6 weeks maybe? he's sitting well on his own for what seem to me to be decent stretches (can lean forward to grab a toy and right himself without falling over).
is this concerning? I initially thought he was just working on other skills and the rolling would come back but it just hasn't. today he tried to roll from back to stomach and couldn't seem to and got very upset.