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To all the people who don't no when you have started your period you will see blood in your underwear so make sure you check your underwear if you don't start your period by the time you turn 13 than you need to go and see your doctor.
first u have cramps them u get a bit of wetness in your undies so if u feel that tell your mom or a women close to u. your vagina will start bleeeding
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