1. 安全期避孕法：Rhodopsin 视紫(红质) | Rhythm method 安全期避孕法 | Rib 肋骨
2. 节律法：rhythm judgment 节奏判断 | rhythm method 节律法 | rhythm of architecture 建筑的韵律
3. 安全期避孕,安全期避孕法：rhythm ==> 周期性变动 | rhythm method ==> 安全期避孕,安全期避孕法 | rhythm selection buttons ==> 节奏选择钮
1. rhythm method
1. About 17 percent of sexually experienced teen girls say they had used the rhythm method, timing their sex to avoid fertile days to prevent getting pregnant.
noun
1. 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)
Synonym: rhythm method of birth control rhythm calendar method of birth control calendar method