叮咚泉营养健康 她和他 http://DingDongQuan.com/she-he
最不安全的三大“避孕安全期”
安全期避孕
育龄妇女每月在排卵期后2-3天内,受孕的>可能性最大。一个月当中有20余天不易受孕,称为“安全期”。但“安全期”并不安全。
妇女排卵时间虽然多在月经中期,但由于外界环境、气温、情绪、健康状况等因素影响,可使排卵时间提前或延后。有些妇女受性生活的刺激时还可出现“额外排卵”,结出不情愿的“果实”。为此,育龄妇女还是选用可靠的长效避孕措施为好。
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