. . . "Precocious puberty is when these body changes happen earlier than normal.Alternative NamesPubertas praecoxCausesPuberty usually begins between ages 8 and 14 for girls and ages 9 and 16 for boys.The exact age a child enters puberty depends on a number of factors, including family history, nutrition, and gender.Often there is no clear cause for precocious puberty." . .