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  2. Calendar-based contraceptive methods - Wikipedia

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

    [18] [20] A product called CycleBeads was developed alongside the method to help the user keep track of estimated high and low fertility points during her menstrual cycle. The standard days method is only effective for women whose cycles are consistently between 26 and 32 days in length; it is estimated that between 50% and 60% of women of ...

  3. CycleBeads - Wikipedia

    en.wikipedia.org/wiki/CycleBeads

    The Standard Days Method identifies days 8-19 of cycle for women with cycles between 26 and 32 days long, as the potential fertile window. This formula is based on computer analysis of 7,500 menstrual cycles and takes into account cycle length, the timing of ovulation, the variation of the timing of ovulation from one cycle to the next, as well ...

  4. Creighton Model FertilityCare System - Wikipedia

    en.wikipedia.org/wiki/Creighton_Model_Fertility...

    The Creighton Model FertilityCare System (Creighton Model, FertilityCare, CrMS) is a form of natural family planning which involves identifying the fertile period during a woman's menstrual cycle. The Creighton Model was developed by Thomas Hilgers, the founder and director of the Pope Paul VI Institute.

  5. Fertility testing - Wikipedia

    en.wikipedia.org/wiki/Fertility_testing

    In women who have regular menstrual cycles, the fertile window occurs at approximately the same time every month. If the first day of menses is considered day 1, then ovulation occurs around day 14. In regular cycles that are 26–32 days long, the fertile window occurs on days 8–19. [9]

  6. Natural family planning - Wikipedia

    en.wikipedia.org/wiki/Natural_family_planning

    In 1905, Theodoor Hendrik van de Velde, a Dutch gynecologist, showed that women only ovulate once per menstrual cycle. [16] In the 1920s Japanese gynecologist Kyusaku Ogino and Austrian Hermann Knaus independently made the discovery that ovulation occurs about fourteen days before the next menstrual period. [ 17 ]

  7. Clue (mobile app) - Wikipedia

    en.wikipedia.org/wiki/Clue_(mobile_app)

    The Clue mobile application calculates and predicts a user's period, fertile window, and premenstrual syndrome. It also informs users the most or least likely time for becoming pregnant and allows them to track more than 30 health categories, including sex, sleep, pain, exercise, hair, skin, digestion, emotions and energy. [13]

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