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  1. Menstruation - Wikipedia

    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] The menstrual cycle is …

  2. Menstruation: 13 Period Facts You Need To Know - Health

    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.

  3. 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 once every month.

  4. Period Symptoms and Signs: Normal, and When to See a Doctor

    Mar 25, 2019 · Women typically get a few signs that their period is about to start. Those include things like abdominal cramps, headache, tender breasts, and changes in bowel movements. Symptoms are …

  5. Menstrual cycle: What's normal, what's not - Mayo Clinic

    Apr 22, 2023 · Your period might be light or heavy, painful or pain-free, long or short, and still be considered typical. Within a broad range, "typical" is what's typical for you. Certain kinds of birth …

  6. All About Periods (for Teens) | Nemours KidsHealth

    A period is a release of blood from a girl's uterus, out through her vagina. It is a sign that she is getting close to the end of puberty. It also means that she can get pregnant if she has sex. There is a lot to …

  7. Menstrual Cycle (Normal Menstruation): Overview & Phases

    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.

  8. Menstruation (Menstrual Cycle): Phases, What’s Normal

    Sep 4, 2025 · Menstruation occurs when the lining of the uterus sheds, turning to blood that flows out of the body. But what’s normal is different for everyone. Learn more.

  9. Menstruation | Period | MedlinePlus

    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.

  10. PERIOD Definition & Meaning - Merriam-Webster

    The meaning of PERIOD is the completion of a cycle, a series of events, or a single action : conclusion. How to use period in a sentence. Synonym Discussion of Period.

  11. Normal Period: Timing, Flow, Symptoms, and Tracking - WebMD

    May 27, 2025 · Understand what defines a normal period timing, flow, and symptoms. Track your cycle and know when to consult a doctor for irregularities.

  12. Menstruation | Definition & Process | Britannica

    Nov 12, 2025 · Menstruation, periodic discharge from the vagina of blood, secretions, and disintegrating mucous membrane that had lined the uterus. Learn about the process, characteristics, and …