SACRAMENTO, Calif. — American girls are entering puberty at earlier ages, putting them at far greater risk for breast cancer later in life and for all sorts of social and emotional problems well ...

A new study suggests that growing up in poverty accelerates biological development. For adolescent girls, this early onset of ...

Parents groups sounded off on a new medical study which found fertility blockers could cause long-term fertility and health problems in boys. The study from the Mayo Clinic, which has not yet been ...

During puberty, all kinds of hormonal changes take place in the body, which lead to the development of external sexual characteristics, such as breast growth, a lower voice or body hair growth. For ...

Adolescence and puberty are not the same. Adolescence is that 10- to 12-year period of social and psychological growth that transforms the dependent child (beginning in late elementary or early middle ...