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Charting of basal body temperatures is used in some methods of fertility awareness, such as the sympto-thermal method, and may be used to determine the onset of post-ovulatory infertility. [4] When BBT alone is used to avoid a pregnancy, it is sometimes called the Temperature Rhythm method.
Post-ovulation methods (i.e., abstaining from intercourse from menstruation until after ovulation) have a method failure rate of 1% per year. The symptothermal method has a method failure rate of 2% per year. Cervical mucus–only methods have a method failure rate of 3% per year. Calendar rhythm has a method failure rate of 9% per year.
Two well-known mucus-only methods are the Billings ovulation method and the Creighton Model FertilityCare System. If two or more signs are tracked, the method is referred to as a symptothermal method. Two popular symptothermal systems are taught by the Couple to Couple League and the Fertility Awareness Method (FAM) with Toni Weschler. A study ...
Various methods are known as the Knaus–Ogino method and the rhythm method. The standard days method is also considered a calendar-based method, because when using it, a woman tracks the days of her menstrual cycle without observing her physical fertility signs. The standard days method is based on a fixed formula taking into consideration the ...
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%.
English: This psychrometric chart represents the acceptable combination of air temperature and humidity values, according to the PMV/PPD method in the ASHRAE 55-2010 Standard. The comfort zone in blue represents the 90% of acceptability, which means the conditions between -0.5 and +0.5 PMV, or PPD < 10%.
Methods with little or nothing to do or remember, or that require a clinic visit less than once per year are said to be non-user dependent, forgettable, or top-tier methods. [6] Intrauterine methods, implants, and sterilization fall into this category. [6] For methods that are not user dependent, the actual and perfect-use failure rates are ...
English: This chart represents the acceptable combination of air temperature and humidity values, according to the PMV/PPD method in the ASHRAE 55-2010 Standard. The representation is made on a temperature-relative humidity, instead of a standard psychrometric chart.