It is a somewhat dangerous for a baby to sleep
on his/her tummy, even though few babies die of sids
Years ago in america, when babies slept on their tummies, about 3 babies out of every 1000 would die of sids. Nowadays, when babies sleep on their backs, about 1 to 1.5 babies per 1000 die of sids. So, the chances dying from sids is higher if sleeping on his/her tummy.