Quote:
Originally Posted by Cherry7
Ask Google if you don't believe me.....
When should puberty start?
Puberty in girls usually starts at any time between 8 and 13 years of age, periods usually start about two years after the start of puberty.
Read more: Puberty (girls)
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Quite big deviation you have in there. As we are talking about group of girls (like those dancers), some average or median is better number.