It seems to be part of the customs.

In some places there is a practice of giving gifts like gold or dresses at the time when a girl reaches maturity (first menstrual period). Does it has anything to do with Islam? or is it simply a custom?

Menstruation and post-natal bleeding | March 7, 2014 4:11 am
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I would like to know if a man is born with a female body part or a woman is born with a male body part does he or she get married and if so to which sex? Jazakallah
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From 6thday of my periods it stopped and turned into dark brown color then from 8th day it turned into light brown water type it was same till 12day so what should I do in this situation.This is happening with me from 6 months