Duplications of DAZ gene copy have also been observed in this study, and abnormally high copy numbers of DAZ are likely to increase the risk of spermatogenic failure.

• 此外，我们还发现了AZFc中DAZ基因的重复现象，并且过高的DAZ基因拷贝可能不利于精子的发生。AZFc中的基因都是多拷贝的。