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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Anna Lee Beyer writes about mental health, relationships, parenting, and books for Huffington Post, Romper, Slate, Glamour, Parents, and others. A first menstrual cycle usually occurs between the ages ...

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For girls, starting their period is inevitable. But the age when a child’s period begins, called menarche, can tell them a little about their health later in life. Menarche that begins “anytime ...

Puberty often begins at around 11 years old, although anywhere between about 8 and 14 is considered within the typical range. One of the hallmarks of puberty is getting a first period or beginning ...