Age of puberty among girls decline

According to a new study, the age of puberty is declining for girls, with more of them developing breasts by age 7 than in years... More Below... Posted by on Aug 9th, 2010 and filed under Health.

According to a new study, the age of puberty is declining for girls, with more of them developing breasts by age 7 than in years past.

Researcher Dr. Frank M. Biro, director of the division of adolescent medicine at Cincinnati Children’s Hospital Medical Center, said that ethnicity plays a role in earlier puberty. So does body composition.

Biro said, “We found that girls who are African-American matured before whites, and that’s been shown in several studies. White girls are maturing earlier than they had before, compared to 20 years earlier.”

He found in his study of 1,239 girls that 10 percent of whites, 23 percent of African-Americans, and 15 percent of Hispanic girls had breast development indicating onset of puberty by age 7.

Biro said he can’t give an average age of puberty at this time because many girls in the study have not yet developed breasts. Over time, however, further analysis is expected to provide that and other information.

(Thanks to WebMD and Benjamin Gimmel)