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calendar method


from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rhythm method of natural birth control.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. 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)


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