Young girls menstrual bleeding

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This cross-sectional study aimed to provide an updated picture of age at menarche and main menstrual cycle characteristics and complaints in an Italian population-based sample of 3, adolescents attending secondary school. Factors associated with age at menarche and menstrual disturbances were explored by using multiple logistic models. The prevalence of polymenorrhea was about 2.

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Menstruation typically begins at about age 12, but periods are possible as early as age 8.

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Starting your menstrual period is one of these changes. When puberty begins, your brain signals your body to produce hormones. Some of these hormones prepare your body each month for a possible pregnancy. This is called the menstrual cycle.

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