The average age of puberty in girls is now nine, in a phenomenon increasingly being blamed on rising obesity and exposure to hormone-disrupting pollutants in the food supply.
The study was conducted in 2006 by researchers from the world-renowned Department of Growth and Reproduction at University Hospital in Copenhagen, Denmark. The researchers found that among 1,000 girls, the average age of breast development was nine years and 10 months, a full year earlier than when a similar study was conducted in 1991.
"We were very surprised that there had been such a change in a period of just 15 years," researcher Anders Juul said.'
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