DS2 is 7.5 months. He's been a fairly dreadful sleeper since 4 months. For the last few weeks, he has a handful of times rolled onto his tummy during sleep (I think 3 nights in total, and for the odd nap). The difference is amazing - 2.5 hour naps as opposed to 45 minutes, and maybe one night waking - back sleeping he will wake every 2-3 hours at best and often as frequently as hourly). Would it be awful to start putting him down on his tummy? I think that the SIDS advice is "back to sleep" until aged one, but I am starting to feel a desperate for some decent sleep. He is crawling and rolls a lot through the day, so can easily get himself off his tummy if he wants to. I was hoping that he'd just start tummy sleeping of his own accord every night, but so far that's not happened.