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.

Over the last 55 years, young girls in the US have been getting their first periods earlier and earlier. Nowadays, the average age is roughly 12. Some girls may menstruate as early as 8, according to ...

According to studies, girls who get their menstrual cycles at a young age are more susceptible to long-term health problems. As a result, one mom is trying to prevent her young daughter’s body from ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Nancy Redd Nancy Redd is Wirecutter’s health and grooming writer. Her latest ...

More than 65 percent of women ages 15 to 49 in the United States use some form of birth control, and many of them are on hormonal birth control methods like the pill, patch, ring, implant, injections, ...

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.