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The World Health Organization considers the rhythm method to be a specific type of calendar-based method, and calendar-based methods to be only one form of fertility awareness. [2] More effective than calendar-based methods, systems of fertility awareness that track basal body temperature, cervical mucus, or both, are known as symptoms-based ...
The most effective calendar-based method is the Standard Days Method, a method in which the woman doesn’t have sexual intercourse on days 8-19 of her cycle. [ 14 ] [ 15 ] One symptoms-based method is the TwoDay Method, a method where the woman checks for secretions twice a day and if she has had vaginal secretions that day or the day prior ...
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% ...
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.
Symptoms-based fertility awareness ex. symptothermal and calendar-based methods [38] [note 6] [note 7] TwoDay method, Billings ovulation method, Creighton Model: 24 (1 in 4) 0.40–4 (1 in 25–250) Behavioral: Observation and charting of basal body temperature, cervical mucus or cervical position: Daily Calendar-based methods [29]
Pregnancy can result in up to 25% of the user population per year for users of the symptoms-based or calendar-based methods, depending on the method used and how carefully it was practised. Natural family planning has shown very weak and contradictory results in pre-selecting the sex of a child, with the exception of a Nigerian study at odds ...
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Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent pregnancy. [1] [2] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [3]