精子缺乏

例句：

1. 1. The patient had a sperm deficiency that made him infertile.
   这位病人患有精子缺乏症，导致他无法生育。
2. 2. Sperm deficiency is a common cause of male infertility.
   精子缺乏是男性不育的常见原因。
3. 3. Doctors often recommend lifestyle changes to improve sperm quality and prevent sperm deficiency.
   医生常常推荐生活方式的改变来提高精子质量，预防精子缺乏症。