Why girls have the period problem! Why boys did have
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Girls have uterus and this is for pregnancy. Once the girls uterus is matured Every month the uterus is preparing for the fertilisation and if it doesn't happen the endometrial wall of the uterus will cause periods and boys don't have this process In their body as the are not giving birth
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the reproductive system of girls is different than boys
the uterus causes menstruation which boys dont have thus they do no have periods
the uterus causes menstruation which boys dont have thus they do no have periods
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