One reason some parents prefer to sleep their little ones on their stomachs is due to the chance of them vomiting on their back and suffocating, as a result.  However, this is a myth, and has, in fact, been busted by the American Academy of Pediatrics. These professionals recommend sleeping your baby on their back until, at least, the age of one.  This is simply due to the numerous reports of babies dying as a result of suffocation when placed on their stomachs.  SIDS, otherwise known as Sudden Infant Death Syndrome, is commonly associated with babies sleeping on their stomachs during the first year of their lives.  Babies rolling onto their stomachs are prone to suffocation, and, hence, may wake up crying – due to a decrease in blood pressure and less oxygen reaching their brains.