What is another word for calendar method of birth control?
Pronunciation: [kˈaləndə mˈɛθəd ɒv bˈɜːθ kəntɹˈə͡ʊl] (IPA) 
The calendar method of birth control, also known as the rhythm method, is a natural family planning method that relies on tracking a woman's menstrual cycle to determine when she is most likely to ovulate and avoid intercourse during that time. This method is often referred to as fertility awareness-based methods or natural family planning methods. Other synonyms for the calendar method of birth control include the Standard Days Method, the TwoDay Method, the Symptothermal Method, and the Billings Method. Each method has variations in how it tracks ovulation and determines safe and unsafe times for intercourse, but they all rely on natural methods rather than using hormonal or physical barriers to prevent pregnancy.
