Read it in a magazine..?
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I think girls have to be at least 90lbs. Their body needs to be able to support a pregnancy, and it can't do that if she is below a certain weight.
Everybody is different. You don't have to be a certain weight to get your period.
no, it is a hormonal thing. every girl is different. average, most girls start getting their period around the age of 12-13. some get it earlier than that, some a little later.
Not sure but I can say that I started mine when I was 9 and I was nowhere close to that weight.
no
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