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  2. Calendar-based contraceptive methods - Wikipedia

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

    Even when used perfectly, calendar-based methods, especially the rhythm method, result in a high pregnancy rate among couples intending to avoid pregnancy. Of commonly known methods of birth control, only the cervical cap and contraceptive sponge have comparably high failure rates. This lower level of reliability of calendar-based methods is ...

  3. Comparison of birth control methods - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_birth...

    Effectiveness of contraceptive methods with respect to birth control. Only condoms are useful to prevent sexually transmitted infections. There are many methods of birth control (or contraception) that vary in requirements, side effects, and effectiveness. As the technology, education, and awareness about contraception has evolved, new ...

  4. Fertility awareness - Wikipedia

    en.wikipedia.org/wiki/Fertility_awareness

    Calendar-based methods rely on tracking a woman's cycle and identifying her fertile window based on the lengths of her cycles. The best known of these methods is the Standard Days Method. The Calendar-Rhythm method is also considered a calendar-based method, though it is not well defined and has many different meanings to different people.

  5. Natural family planning - Wikipedia

    en.wikipedia.org/wiki/Natural_family_planning

    Of all American women surveyed nationally in 2002, only 0.9% were using "periodic abstinence" (defined as "calendar rhythm" and "natural family planning") compared to 60.6% using other contraceptive methods. [35]

  6. Billings ovulation method - Wikipedia

    en.wikipedia.org/wiki/Billings_ovulation_method

    The Billings ovulation method is a method in which women use their vaginal mucus to determine their fertility. [3] It does not rely on the presence of ovulation, rather it identifies patterns of potential fertility and obvious infertility within the cycle, whatever its length. Effectiveness, however, is not very clear. [3]

  7. Creighton Model FertilityCare System - Wikipedia

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

    For avoiding pregnancy, the perfect-use failure rate of Creighton was 0.5%, which means that for each year that 1,000 couples using this method perfectly, that there are 5 unintended pregnancies. The typical-use failure rate, representing the fraction of couples using this method that actually had an unintended pregnancy, is reported as 3.2% ...

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