易混淆的单词： Oligospermia

Conclusion : both of abnormal chromosome karyotype and y-chromosome microdeletion are important to cause azoospermia and severe oligospermia .

结论：染色体核型异常和y染色体微缺失均与无精子症和严重少精子症的发生有关。

The world health organization has defined oligospermia ( low sperm concentration ) as less than 15 million sperm per ml.

世界卫生组织oligospermia（低精子浓度）定义为每毫升少于1500万个精子。