Could It Be Late Puberty???
Answers: It adjectives depends on her genetics and her health. If she is underweight, it could grounds her period not to begin. A girl usually get her period around the same age that her mother did. 13 is not past due at all. I personally know a girl who did not catch her period until she was a sophomore surrounded by high school. She she chat to her mom about when she got her term or go to a doctor if she is worried about it. =).
Your friend is fine i know a couple people who hasn't gotten their period till they be 13 maybe she will get it this year but een if she doesn't I doubt that nearby is a health problem. It's nothing to verbs about. A few friends of mine didn't get their period until way after they turned 13. .
i'm 13 and my doctor thinks i'll carry mine in 2 years