Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. [1]

Menstruation — aka having your period — is when blood and tissue from your uterus comes out of your vagina. It usually happens once every month.

period, epoch, era, age mean a division of time. period may designate an extent of time of any length. epoch applies to a period begun or set off by some significant or striking quality, change, or series of …

Jul 29, 2025 · The menstrual phase is your actual period, or when you’re shedding your uterine lining and bleeding. It usually lasts 3 to 5 days, and often overlaps with the follicular phase.

Dec 10, 2025 · Getting a period, or menstruating, occurs about once a month, may come with PMS or PMDD, and may give clues about your overall health.

There is a lot to learn about periods. Here are answers to some common questions. When Do Periods Usually Start? Most girls get their first period when they're around 12. But sometimes it comes a few …

Your menstrual cycle begins on the first day of your period. Your cycle prepares your body for a possible pregnancy. The average cycle lasts between 24 and 38 days.

Jan 11, 2026 · Menstruation (or period) happens monthly. As the uterus sheds its lining, vaginal bleeding follows. Menstrual blood is made of blood and tissue.

Sep 4, 2025 · Menstruation is period bleeding, which is casually referred to as “having your period.” This happens monthly (for most females) during your fertile years, except during pregnancy.

Apr 22, 2023 · What's typical? The menstrual cycle is counted from the first day of one period to the first day of the next. The cycle isn't the same for everyone. Menstrual bleeding might happen every 21 to …