The age of puberty for girls has been falling for decades, especially among Black and Asian Americans. “This work is still in ...

Early periods, also known as menarche, are becoming increasingly common among girls. While it is natural for girls to begin menstruating at a certain age, there is growing concern that the age of ...

Numerous factors are likely behind the increase — including obesity, alcohol consumption, genetics and some hormonal birth control — but the role early puberty plays in a woman’s breast cancer risk is ...