安全期計算方式 - 成人話題討論

By Kama
at 2016-01-28T09:13
at 2016-01-28T09:13
Table of Contents
我知道等一下有人會推文說你就乖乖戴套就好= =
不過我還是很疑惑,想來問一下
因為長輩是說不管月經週期如何
就是月經來前7天和月經最後一天之後隔天算起7天
也就是前7後7的算法就對了
爬了一堆文看到的是一堆複雜的算法
到底是不是前7後7就ok,還是?
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