| Knaus | Hermann, Austrian gynecologist, *1892. See: Ogino-Knaus rule. (05 Mar 2000) |
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| Ogino-Knaus rule | The time in the menstrual period when conception is most likely to occur is at about midway between two menstrual periods; fertilization of the ovum is least likely just before or just after menstruation; the basis for the rhythm method of contraception. (05 Mar 2000) |
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