Why puberty starts earlier nowadays?

Question

I’ve seen a study which found that the age of puberty (especially female puberty) is dropping rapidly. In 1860 it started around 16.8 and in 2010 it was 10.8. Why is that? Is there any explanation?

In: Biology

Answer 1

I think onset of puberty is related to males living in the house (as in father). If the father lives at home, onset is later.