Menstrual Health Tips: When should women have their first period, what health information is related to its timing, and what are the possible risks? Menstrual Health Tips: Menstruation is an important ...

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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Girls in the U.S. are getting their first period earlier than in decades past. Researchers say there are multiple factors causing early puberty, including obesity and environmental pollutants. Girls ...

Girls in the United States are getting their periods earlier, and it's taking longer for them to become regular, according to a study. The age at which women get their first period, known ...

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 ...

Girls are getting their first periods at a younger age, according to a new study. Research conducted by Harvard University's public health school found that, in the US, the time of a person's first ...

SAN FRANCISCO—The age at which a woman has her first period can offer valuable clues about her long-term risk for conditions like obesity, diabetes, heart disease and reproductive health issues, ...

There is unexpectedly large variation in height growth in girls after their first period. Every second girl grows either more or less in length than the 6-8 centimeters that is considered standard.