T.B.
M. - Here is a great scientific study done on pre-pubertal development in girls. Here's one capture that I hope will ease your mind:
First, many in the field would answer “Yes, girls are entering puberty at an earlier age.” Anecdotally, this has been a popular view. In 1997, a controversial article was published indicating that puberty may be initiated earlier in girls than in previous cohorts, perhaps on average between age 7 and 13 years (Herman-Giddens et al., 1997). The study represents a major effort in the field describing puberty. Over 17,000 girls from primarily suburban general pediatric practices were included, with 9.6% being African-American. The girls ranged in age from 3–12 years but not yet 13 in this cross-sectional study.
Cut and paste the link starting at the http://. Leave out the stars.
Hope this helps.
**http://www.sciencedirect.com/science?_ob=ArticleURL&_...