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rhythm method of birth control

 
Noun rhythm method of birth control has 1 sense
  1. rhythm method of birth control, rhythm method, rhythm, calendar method of birth control, calendar method - 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)
    --1 is a kind of natural family planning
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