Young girls in America are experiencing puberty at an earlier age than biologists would particularly expect with the average age falling to ten, with black girls undergoing the process a year earlier than their peers on average, experts warn.
The phenomena was first detected by Dr Marcia Herman-Giddens, a public health expert at the University of North Carolina, when she began to gather data on more than 17,000 girls in the mid-1990s.
She found that the average age of puberty was dropping, falling to ten years old, with some girls developing as early as age six.
https://www.dailymail.co.uk/health/article-10834835/Young-girls-starting-undergo-puberty-young-six-years-old.html