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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, she ...
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.
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 ...
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% ...
Typical use of this method is associated with a pregnancy rate of 1 to 22%. [1] A World Health Organization study found that 15% is caused by a conscious departure from method rules. [1] The percentage of people who stop using the method after a year is 1–24%. [1] Perfect use has been estimated to result in pregnancy in 0.5–3%.
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Ogino in 1924. Kyusaku Ogino (荻野 久作, Ogino Kyūsaku, 25 March 1882 – 1 January 1975) was a Japanese medical doctor specializing in obstetrics and gynecology.. His natural father's family name was Nakamura, but Kyusaku was adopted by the Ogino family in 1901.