The timing of puberty

What factors influence the timing of puberty? What factors explain the increasing rates of adolescent girls going through puberty early (also known as precocious puberty)?
What is normal? When it comes to puberty, few boys or girls report feeling normal! This intense period of change can be challenging for even the most confident young person. Who do you think struggles more socially during puberty: boys or girls who develop early vs. boys or girls who develop later? At what age should parents begin talking to their child about puberty?

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