Onset of puberty in girls has fallen by five years since 1920

No one is sure what is causing the change

America's premature puberty phenomenon explained: Girls are starting transition as young as SIX

At what age did people start puberty in the Middle Ages? - Quora

Is it normal for my 16-year-old sister to still be watching TV

The duration of puberty in girls is related to the timing of its onset - ScienceDirect

One Family's Battle to Avoid Added Hormones – Five Star Home Foods

Onset of puberty in girls has fallen by five years since 1920

Why is puberty coming earlier for girls today?

One Family's Battle to Avoid Added Hormones – Five Star Home Foods

Why are many adults so desperate to stop puberty from happening to

One Family's Battle to Avoid Added Hormones – Five Star Home Foods

Onset of puberty in girls has fallen by five years since 1920, Children

Why Are Girls Hitting Puberty Younger and Younger?