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  1. 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 of menstrual bleeding is the date used for the last …

  2. What is Menstruation? | Get Facts About Having Your Period

    Periods get lighter and shorter over time, or come when you don’t expect it. You may have spotting or cramping every once in a while until you stop getting your period, and sometimes …

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

    2025年12月10日 · 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 …

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

    2023年4月22日 · Your periods are less than 21 days or more than 35 days apart. You bleed between periods. You develop severe pain during your period. You suddenly get a fever and …

  5. Menstrual Cycle - Office on Women's Health

    2021年2月22日 · Regular menstrual periods in the years between puberty and menopause are usually a sign that your body is working normally. Irregular or heavy, painful periods are not …

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

    2025年9月4日 · Menstruation (period blooding) is when the uterus lining sheds and leaves the body as blood, typically lasting three to seven days each month. You can manage menstrual …

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

    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 …

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

    Most people have their period (bleed) for between three and seven days. Is a three-day period normal? A period is normal if it’s anywhere between three and seven days. While on the …

  9. Periods - NHS

    Find out about periods, including when they usually start and finish, period products, PMS, getting pregnant, and changes to your periods.

  10. Menstruation | Period | MedlinePlus

    2024年2月29日 · Periods usually start between age 11 and 14 and continue until menopause at about age 51. They usually last from three to five days. Besides bleeding from the vagina, you …