At what age does puberty begin in females?
11 to 12 years.
Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction. It is initiated by hormonal signals from the brain to the gonads: the ovaries in a girl, the testes in a boy. Puberty, in girls, is most commonly observed when they are about 11 to 13 years old. In boys, it is little later i.e. 12-14 years.