The<unk> , also known as the calendar<unk>  or the Knaus-Ogino<unk>  (named after Hermann Knaus and Kyusaku Ogino), is a<unk>  of natural birth control that involves counting days of a woman's menstrual cycle in order to achieve or avoid pregnancy.  A recently developed variant of the<unk>  is known as the Standard Days<unk> .
Rhythm method
Thermodynamic system
Clinical prediction rule
Theoretical plate
Dose Profile
Kick chart
Podalic version
Chapter checklist