An increasing number of U.S. girls are now reaching puberty as young as the age of seven, according to a study conducted by researchers from Cincinnati's Children's Hospital and published in the journal Pediatrics.
Researchers examined more than 1,200 girls between the ages of six and eight who were living in Cincinnati, San Francisco or East Harlem, N.Y. twice between 2004 and 2006. Each examination was conducted by a different female pediatrician, who felt the girls for the development of breast tissue.
The researchers found that 10.4 percent of white girls, 15 percent of Hispanic girls and 23.4 percent of black girls had developed breast tissue by the age of seven. In contrast, one study 10 years ago found that only 5 percent of white girls and 15.4 percent of black girls had developed breast tissue by that age.
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Researchers examined more than 1,200 girls between the ages of six and eight who were living in Cincinnati, San Francisco or East Harlem, N.Y. twice between 2004 and 2006. Each examination was conducted by a different female pediatrician, who felt the girls for the development of breast tissue.
The researchers found that 10.4 percent of white girls, 15 percent of Hispanic girls and 23.4 percent of black girls had developed breast tissue by the age of seven. In contrast, one study 10 years ago found that only 5 percent of white girls and 15.4 percent of black girls had developed breast tissue by that age.