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。

Conclusions : it is a recommendable method that simple testicular needle aspiration in the men diagnosis and treatment of the men with obstructive azoospermia .

结论简易式睾丸穿刺取精用于阻塞性无精子症的诊治是一种值得推广的方法。

Detection of y-chromosome azoospermia factor microdeletion of male infertility crowd in east guangdong and its clinical application .

粤东地区男性不育人群y染色体无精子因子微缺失的检测及临床应用。