average length of babies at birth
In first world nations, the average total body length of newborns are 35.6â50.8 cm (14.0â20.0 in), although premature newborns may be much smaller. The Apgar score is a measure of a newborn's transition from the uterus during the first minutes after birth.
A newborn's head is very large in proportion to the body, and the cranium is enormous relative to his or her face. While the adult human skull is about one seventh of the total body length, the newborn's is about Â¼. Normal head circumference for a full-term infant is 33â36 cm at birth.