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

Few topics provoke as much concern as the perception that puberty is beginning earlier than ever. While synthetic ...

The unrealistic ideals placed on female athletes are not only ignorant, but also deeply harmful, writes Lauren Fleshman.

Tanner stages track five milestone physical changes during puberty for both boys and girls. Early puberty in females starts before age 8, and before age 9 in males. Delayed puberty is when girls don't ...