Home > Encyclopedia of Children's Health > Puberty

Definition

Puberty is the period of human development during which physical growth and sexual maturity occurs.

Description

The word puberty is derived from the Latin pubertas, which means adulthood. Puberty is initiated by hormonal changes triggered by a part of the brain called the hypothalamus, which stimulates the pituitary gland, which in turn activates other glands as well. These changes begin about a year before any of their results are visible. Both the male reproductive hormone testosterone and female hormone estrogen are present in children of both sexes. However, their balance changes at puberty, with girls producing relatively more estrogen and boys producing more testosterone.

Beginning as early as age eight in girls—and two years later, on average, in boys—the...