Boys in the United States are starting puberty earlier than ever, according to a new study publishing in the November issue of the journal Pediatrics.
In the study, lead author Marcia Herman-Giddens from the University of North Carolina's School of Public Health and her colleagues show that boys are starting to sexually develop six months to two years earlier than medical textbooks say is standard.
This research has been a long time coming. Herman-Giddens first documented early puberty in girls in 1997, and several studies have since backed up those findings.
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