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1·Objective: to discuss the duration of withering in rats spermatogenic cells induced by artificial cryptorchism.

目的探讨人工隐睾诱导小鼠生精细胞凋亡的时间依赖性。

2·Conclusions: For cryptorchism, B-ultrasonography is a simple, safe and effective, and repeatable diagnostic method, may be the image method of first choice.

结论：B超对隐睾的位置、大小、内部回声的诊断确切，而且超声检查无损伤、无痛苦、简便、经济、可重复，可作为隐睾症的首选影像学检查方法。