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, …

Mar 25, 2019 · Somewhere between 5 days and 2 weeks before your period starts, you may experience symptoms that let you know it’s coming. These symptoms are known as …

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 …

Dec 9, 2022 · 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.

Sep 21, 2025 · Menstruation, also known as a period, occurs when your uterus sheds its lining, causing blood and mucus to discharge from the vagina. 1 This usually occurs once a month if …

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.

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 …

Menstruation is the shedding of the lining of the uterus (endometrium) accompanied by bleeding. It occurs in approximately monthly cycles throughout a woman's reproductive life, except …