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2009年4月1日星期三
理论上小孩子也可以去捐精了
使小鼠繁殖一代的时间缩短近半
科研人员为了缩短小鼠的繁殖时间，从性成熟前的雄性小鼠体内提取圆形精子细胞，通过显微受精技术，成功使雌鼠受孕。雄性小鼠诞生22天以后，就能提取它们的圆形精子细胞并使雌鼠受精
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