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bn:00014709n
Noun Concept
SYL
No term available
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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IS A
EN
natural family planning
NAMED AFTER
Kyūsaku Ogino
Hermann Knaus

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