(n) natural family planning in which the fertile period of the woman's menstrual cycle is inferred by noting the rise in basal body temperature that typically occurs with ovulation, Syn. basal body temperature method
[ぶん, bun] (n) (1) (See 文・もん・2) one-tenth; one percent (one-tenth of a wari); 3 mm (one-tenth of a sun); 2.4 mm (one-tenth of a mon, a traditional unit used to measure shoe sizes); 0.375 grams (one-tenth of a monme); 0.1 degree (one-tenth of a do, used to measure body temperature on any temperature scale); (2) one-quarter of a ryou (obsolete unit of currency); (3) thickness; (4) advantageous circumstances#146