为什么吃了事后避孕药还是怀孕了

来自张建海医生的专业解答，快打开看看是否又获得了新的知识点～

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彩牛养生

病情分析：吃了紧急避孕药还会怀孕的常见原因可能有：1、没有按照说明书服用药物：如炔诺孕酮类紧急避孕药0.75mg规格，在同房后72小时以内首次只服1片，间隔12小时忘记补服第2片。2、按说明书服用避孕药后72小时之内，再次发生性关系而且没有采取其他屏障保护。以上仅供参考。

张建海

主任医师

提示：本内容仅作参考，不能代替面诊，如有不适请尽快线下就医

问题描述：我和男朋友同房后吃了避孕药为什么还是怀孕了呢？