It’s normal to get your period as early as 9 years old or as late as 15 years old. This is a big time range, and it’s hard to be one of the first or one of the last. Girls who are active in sports or are very thin may not get their period until a later age. Losing weight while you’re in your growth spurt can also delay your periods. Talk to your parent or your health care provider about your worries and concerns. If you haven’t gotten your period by the time you are 15 OR if you started your breast development more than three years ago and haven’t gotten your period, get a check-up with your health care provider just to make sure everything is okay. Your health care provider sees many girls who develop late, so don’t be embarrassed to ask.