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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A first menstrual cycle usually occurs between the ages of 10 and 16 with the average age of a first period being 12.4 years old. That’s a pretty wide range, so how do you know when your kid needs ...

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 ...