bn:00014709n
Noun Concept
Categories: Articles with short description, Calendars, Fertility awareness
EN
rhythm method of birth control  rhythm method  rhythm  calendar method of birth control  calendar method
EN
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) WordNet 3.0
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EN
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) WordNet 3.0 & Open English WordNet
Calendar-based methods are various methods of estimating a woman's likelihood of fertility, based on a record of the length of previous menstrual cycles. Wikipedia
Methods of estimating a woman's fertility Wikidata
A method of natural birth control that involves counting days of a woman's menstrual cycle in order to determine when sexual intercourse is most or least likely to result in pregnancy. Wiktionary