The beginning of adolescence is a tough time for any girl. It's harder when you're growing up in a tough neighborhood and go to a rough school. And it's really hard when you face all the surging hormones and other tribulations of puberty before you even reach your eighth birthday.
The latest research adds to a growing body of evidence suggesting that an array of social and environmental factors may be causing girls' bodies to develop prematurely. The New York Times reports that the potential causes flagged by researchers include exposures to chemical contaminants and obesity.



