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  2. Calendar-based contraceptive methods - Wikipedia

    en.wikipedia.org/wiki/Calendar-based...

    In the 1920s, Kyusaku Ogino, a Japanese gynecologist, and Hermann Knaus, from Austria, working independently, each made the discovery that ovulation occurs about fourteen days before the next menstrual period. [13] Ogino used his discovery to develop a formula for use in aiding infertile women to time intercourse to achieve pregnancy.

  3. Menstruation - Wikipedia

    en.wikipedia.org/wiki/Menstruation

    Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle 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. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone ...

  4. Ovulation - Wikipedia

    en.wikipedia.org/wiki/Ovulation

    Oligoovulation is infrequent or irregular ovulation (usually defined as cycles of greater than 36 days or fewer than 8 cycles a year) Anovulation is absence of ovulation when it would be normally expected (in a post-menarchal, premenopausal female). Anovulation usually manifests itself as irregularity of menstrual periods, that is ...

  5. Flo (app) - Wikipedia

    en.wikipedia.org/wiki/Flo_(app)

    Flo is a health app that provides menstrual cycle and ovulation tracking as well as pregnancy tracking. [1] The application is available on iOS and Android. [2] Application's development hubs are in London, Amsterdam and Vilnius. [3] [4] Flo has over 380 million downloads worldwide and over 70 million monthly active users as of November 2024. [5]

  6. Irregular menstruation - Wikipedia

    en.wikipedia.org/wiki/Irregular_menstruation

    Irregular menstruation is a menstrual disorder whose manifestations include irregular cycle lengths as well as metrorrhagia (vaginal bleeding between expected periods). The possible causes of irregular menstruation may vary. The common factors of it are related to lifestyle, such as stress, body weight, and smoking status. [1]

  7. Anovulation - Wikipedia

    en.wikipedia.org/wiki/Anovulation

    It is in fact possible to restore ovulation using appropriate medication, and ovulation is successfully restored in approximately 90% of cases. The first step is the diagnosis of anovulation. The identification of anovulation is not easy; contrary to what is commonly believed, women undergoing anovulation still have (more or less) regular periods.