Before revision: Although sleeping in the supine position without sufficient tummy time may change the physical appearance of the head through plagiocephaly and consequently promote developmental delays, regardless of these effects, it is essential that infants are placed to sleep on their back due to the risk of SIDS.
After revision: Although sleeping in the supine position without sufficient tummy time may change the physical appearance of the head through plagiocephaly and consequently promote developmental delays, regardless of these effects, it is essential that infants are placed to sleep on their back , because of the risk of SIDS.