Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A birth-control method dependent on abstinence during the period of ovulation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. 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.

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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