My DD is 14 and 9 months and hasn't started her period yet. I started age 13. She is 5ft 4 and a size 8, not sure of weight but def over 7 stone. She started with pubic hair a the age of 9 and has developed small breasts over the last couple of years. The thing is she is a September child so i thought she'd be amongst the first in her class but she says she and only one other haven't started. She isn't worried but it crosses my mind now and again. should I worry?