Puberty is a time in life when the body starts changing from childhood to adulthood, according to the American Academy of Pediatrics (AAP).
Hormones cause many changes in the body, including the growth of pubic hair, pimples, menstruation, and more, according to the AAP.
For girls, puberty usually starts between age 8 and 13, but there is no correct time for it to begin, according to the AAP. Every person experiences puberty differently and changes in their own way, at their own pace.