1. Objective To discuss the ideal operation method to cryptorchism.

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

3. The effects of artificial cryptorchism on spermatogenesis in rats were analysed by using HE staining and in situ DNA 3, -end labeling technology.

4. Methods The outside fixation of the scrotum thecae and the testicle traction were applied to cryptorchism.

5. Objective To investigate the significance of changes of serum sex hormone levels after operation in children with cryptorchism.

6. Methods: Cryptorchid models were established and detected at different time after artificial cryptorchism.

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7. Results The outside fixation of the scrotum thecae and the testicle traction were applied to all the 74 cases of cryptorchism, and 82 testicles were fixed.

8. Objective: To discuss the duration of withering in rats spermatogenic cells induced by artificial cryptorchism.

9. They produced offspring better than themselves but sometimes they also produced cryptorchism, underbites and missing teeth.

10. Purpose:To evaluate the curative effects of a modifified operation for congenital cryptorchism .

11. To explore the mechanism of testicular descent of human fetus and the cause of cryptorchism.

12. Methods Plasma VEGF contents were determined with ELISA in 30 pediatric patients with cryptorchism both before and after operation as well as in 35 controls.