HEAD
The occipito-frontal measurement of the child at birth is from 13.52 inches to 13.90 inches. The most rapid growth of the head takes place during the first year. With the average child this growth is about four inches. For the first few months the growth is about half an inch per month. During the second year the circumference of the head increases only about one inch and for the next three years, about one and one-half inches. From this time until puberty, about five years, it increases only about half an inch. The head develops so rapidly so early in life that it appears to be all out of proportion for the body.