I know all babies are different but I just wondered roughly how many months they are when they start to roll over onto their front. DS is 5 months and hasn't showed any interest in even trying to roll, and he really doesn't like it if I put him onto his front - he lasts a couple of seconds before putting his face in the carpet and crying. My friend's baby is rolling over at 4 months - just wondered when other people's LOs did this?