DS 13 months have never crawled (is nearly walking) and only rolled over back to front in the last month (GP and HV not worried). Now rolls over onto his front in his sleep, but can't roll back onto his back (IYSWIM). Seems to upset him at c5am (I think the start of the last sleep cycle of the night). At the moment I am going into his room at 5am and putting him on his back again and he then goes back to sleep again (until 6.30 when the same thing happens but by then I just get him up). anyone else had this? Presumably eventually they learn to roll back onto their backs? Its driving me mad......