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.

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 ...

If you purchase an independently reviewed product or service through a link on our website, SheKnows may receive an affiliate commission. “Red Drop was started out of my classroom,” Roberts, then a ...

A new study out of Brazil links early or late menstruation onset to health struggles later in life. How the timing of your first period can influence your risk of obesity, high blood pressure and ...

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 ...

I still remember the first time I calmly went to my Ma and informed her that I got my first period. I was still a kid, but my mom said, "My baby's all grown up now" in an emotional voice. To say that ...

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.