is it okay if my child sleeps on stomach   

Most babies prefer sleeping on their stomachs but it is not safe. One of the most important ways to prevent SIDS (sudden infant death syndrome), is to place your baby to sleep on his/her back from the moment (s)he is born. Unless you have been advised otherwise for some medical reason by your doctor, make your child sleep on their back. Sleeping on the stomach or sideways results in overheating, re-breathing exhaled air, increasing the risk of SIDS. Even if the baby changes position during the night, gently put him/her on its back again whenever you notice it. Sleeping on the back also reduces nasal congestion.