The average age of the onset of puberty has been dropping in the last century—with some girls starting to develop breasts as early as age six or seven. These shifts in the reproductive development ...

Doctors and parents were stunned when research published more than a decade ago found American girls were beginning puberty at much younger ages, some as early as 7. A new study released Sunday ...

Siena McCaffrey investigates the concerning global trend of earlier puberty onset in females. What is causing this phenomenon, and why is it important to understand?

Recreational physical activity may be associated with breast tissue composition and biomarkers of stress in adolescent girls, according to a new study from Columbia University Mailman School of Public ...