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Definition of Calendar method
1. Noun. Natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle).
Exact synonyms: Calendar Method Of Birth Control, Rhythm, Rhythm Method, Rhythm Method Of Birth Control
Generic synonyms: Natural Family Planning
Generic synonyms: Natural Family Planning
Definition of Calendar method
1. Noun. A rhythm method of natural birth control. ¹
¹ Source: wiktionary.com