Thursday, April 28, 2011
Girls Hit Puberty Earlier than Ever; Doctors Unsure Why
About 15% of American girls now begin puberty by age 7, according to a study of 1,239 girls published last year in Pediatrics. One in 10 white girls begin developing breasts by that age - twice the rate seen in a 1997 study. Among black girls, such as Laila, 23% hit puberty by age 7.
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