Clue asked people about their first period.
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Puberty happens in stages. As your hormones change, your body becomes more “adult” and prepares for the possibility of pregnancy. This process usually lasts about 2-5 years. In the years before you get your first period, you’ll first notice changes like the growth of breasts and pubic hair. Most people begin puberty between the ages of 8-13 and start menstruating at 9-15.
The American Congress of Ob/Gyns recommends that anyone who begins to see signs of puberty before turning nine or who hasn’t experienced any signs after reaching 15 should have a check-up with an OB/GYN.
Read more on the "Beginner's guide to getting your period".