Babies have relatively weak neck muscles and can't control their heads during the first few months after birth. (mayoclinic.org)
A consumer alert released by the agency today says newborns are at particular risk because they have weak neck muscles which make it difficult for them to move to a better position if they are suffocating. (abcnews.go.com)
Remember, he has a heavy head and weak neck muscles. (dadsadventure.com)