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来潮之前多少天安全期
更新时间: 2020-11-04 00:00:00  

前7天。除了月经期和排卵期,其余的时间均为安全期。对于经期规律,而且月经周期为28天的女性,排卵日是在下次月经来潮前14天左右,排卵日及其前5天和后4天,总共约有10天的时间为排卵期。

关键词: 之前 多少 安全

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