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.

You’ve probably heard the old saying that really bad period cramps mean your body is super fertile and ready for pregnancy. It’s a belief many women hold on to, especially when the pain feels ...

Add Yahoo as a preferred source to see more of our stories on Google. Periods are triggered by a drop in hormone levels in your body, specifically estrogen and progesterone, Dr. Anita Somani, ...

Do you remember how old you were when you got your first period? And whether it was considered early, late or about average? Some parents are reportedly overhauling lunchboxes and shampoos and doing ...

No, painful periods are not directly a good sign of fertility. In fact, it can often indicate an underlying condition that may affect fertility, such as endometriosis. As cramps are a common part of a ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The first few times you get your period, it’s totally normal to feel caught off-guard. (But, ofc, not ...