Menstruation - Wikipedia
Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day …
Menstrual Cycle (Normal Menstruation): Overview & Phases
Menstruation is also known by the terms menses, menstrual period, menstrual cycle or period. Menstrual blood — which is partly …
Menstrual cycle: What's normal, what's not - Mayo Clinic
Jun 3, 2026 · Understand how to track your menstrual cycle and what to do about irregularities. Do you know when your last …
Menstrual health - World Health Organization (WHO)
Jun 18, 2026 · Menstruation is a natural bodily process, but people who menstruate experience it differently. The experience can be …
What is Menstruation? | Get Facts About Having Your Period
Menstruation — aka having your period — is when blood and tissue from your uterus comes out of your vagina. It usually happens …
Menstruation | Period | MedlinePlus
May 28, 2026 · Menstruation (or period) happens monthly. As the uterus sheds its lining, vaginal bleeding follows. Menstrual blood is …
Menstruation | Definition & Process | Britannica
Sep 4, 2026 · Learn about the process, characteristics, and significance of menstruation with this article.
Menstruation and Menstrual Problems - NICHD
Dec 2, 2016 · The menstrual cycle is the monthly process in which female hormones stimulate an ovary to release an egg, thicken …
Menstrual Cycle - Office on Women's Health
Feb 22, 2021 · The menstrual cycle is the hormonal process a woman's body goes through each month to prepare for a possible …
Menstruation (Menstrual Cycle): Phases, What’s Normal
Jul 2, 2026 · Menstruation (period blooding) is when the uterus lining sheds and leaves the body as blood, typically lasting three to …