rhythm method
参考词典中rhythm method的常规释义：
基本释义
- 安全期避孕，安全期避孕法
英英解释
1个名词解释
- 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)
[同] calendar method, calendar method of birth control, rhythm, rhythm method, rhythm method of birth control
点击查看……- 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)
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