FWIW I thought I would add that when I've seen pics of friends premmie babies (both in SCN and NICU) that have been of them tummy sleeping. If the midwives in the nurseries will let them do it (presumably so that they get that much needed sleep) and when they are so small, it must not be as risky as some people will have you think. That said, I personally think that if you are going to let bubs tummy sleep then it is best to have a movement monitor, mainly for peace of mind, but also just in case.