The following are health and medical definitions of terms that appear in the Lung Cancer article. Abdomen: The belly, that part of the body that contains all of the structures between the... See the entire definition of Abdomen. Abdominal: Relating to the abdomen, the belly, that part of the body that contains all of ...
Head and neck muscles are the first to come under a baby's control. Muscle control moves downward, toward the feet. Babies typically roll from tummy to back first beginning at around 4 months of age and then back to tummy around 6 months of age, according to the A.I. DuPont Hospital for Children.
A baby needs to develop muscle strength to be able to roll over, first from tummy to back, then vice versa. Babies may be able to roll over from tummy to back as early as 3 months and should be able to do so by 6 or 7 months. While lying on his or her tummy, you may first notice at about 3 or 4 months your baby lifting his or her head up.