Researchers found that the age at which girls begin to develop breasts has fallen by about three months per decade since the 1970s.
Why More and More Girls Are Hitting Puberty Early
Best Movies to Watch About Puberty and Growing Up
Girls who do not live with both parents more likely to start puberty early - Kaiser Permanente Division of Research
Puberty starts a year earlier for girls now than in the 1970s
Why More Kids Are Starting Puberty Earlier Than Ever Before
Girls are reaching puberty earlier and earlier. No one is sure why
The Care and Keeping of You,' 20 Years Later - The Atlantic
Why Are More Children Going Through Puberty At A Younger Age? - Texas A&M Today
With puberty starting earlier than ever, doctors urge greater awareness and care
The health risks of maturing early
Girls beginning puberty almost a year earlier than in 1970s, Children
Are Girls Getting Their Periods Earlier?
Girls start puberty a year earlier than they did in the 1970s, sparking fears obesity is to blame
