rhythm method of birth control, rhythm method, rhythm, calendar method of birth control, calendar method(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)
A rhythm method of natural birth control.
The numerical value of calendar method in Chaldean Numerology is: 8
The numerical value of calendar method in Pythagorean Numerology is: 6
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"calendar method." Definitions.net. STANDS4 LLC, 2017. Web. 22 Oct. 2017. <http://www.definitions.net/definition/calendar method>.