A female’s first menstrual period, known as menarche, occurs during puberty. Menstruation indicates that the body is mature enough for reproduction. About 98% of girls begin their periods by age 15.
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Implantation Bleeding vs. Period: How to Tell the Difference
Medically reviewed by Renita White, MD Key Takeaways Implantation bleeding is usually light pink or rust-colored, while ...
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