Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day of menstrual bleeding is the date used for the last menstrual period …

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

Dec 10, 2025 · Periods, also known as menstruation, occur when your uterus sheds its lining, causing blood and mucus to discharge from the vagina. 1 This usually occurs once a month if you are not …

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.

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.

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 …

Feb 29, 2024 · Menstruation (or period) happens monthly. As the uterus sheds its lining, vaginal bleeding follows. Menstrual blood is made of blood and tissue.

It may look like a lot of blood, but a girl usually only loses a few tablespoons of blood during the whole period. Most girls need to change their pad, tampon, or menstrual cup about 3‒6 times a day.

The State of the Period continues to be the only publicly available study tracking the impact of period poverty — the inability to access menstrual hygiene products — among U.S. teenage students.

A period is the part of the menstrual cycle when a woman bleeds from her vagina for a few days. For most women this happens around every 28 days, but it's common for periods to be more or less …