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. ).
- synonyms: rhythm method of birth control, rhythm method, rhythm, calendar method
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). calendar method of birth control. Retrieved September 21, 2026, from http://smartdefine.org/calendar_method_of_birth_control/definitions/1262668 |
| Chicago | WordNet. 2010. "calendar method of birth control" http://smartdefine.org/calendar_method_of_birth_control/definitions/1262668 (accessed September 21, 2026). |
| Harvard | WordNet 2010, calendar method of birth control, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/calendar_method_of_birth_control/definitions/1262668>. |
| MLA | WordNet. "calendar method of birth control" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/calendar_method_of_birth_control/definitions/1262668> |