How old should a girl be when she gets her period?

any age from 12 to about 17. if you are older than 17 and still haven't gotten it, you should probably see a doctor to check if every-things okay. i don't see why you should freak out though, your lucky if you don't have it until your older- IT SUCKS!!

(:

well it starts t age 10 for some girls but it's the age 11-18 but you'll still get it when you grow up