Answer by
traumatised (3285)
Depends on her age. If she demonstrates early "precocious" puberty signs (e.g. breast or armpit/pubic hair development, acne, menstruation) before the age of 7-8, talk to a physician. Otherwise puberty varies. I didn't get my period until I was 14, but my sister got hers at 9 and this is normal, too.