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目的：研究热作用对睾九生精过程影响中多核细胞的出现、类型、消失及生物学意义，为男性抗生育提供形态学资料。方法：人工隐睾术后２～７０天取出大鼠睾丸和附睾，Ｂｏｕｉｎ和Ｓｕｓａ液固定，石蜡切片，光镜观察。结果：术后３天，少数曲细精管出现个别的多核细胞，为精子细胞型和精母细胞型；术后４天，附睾管头段可见多核细胞；术后６天，多数曲细精管出现较多的多核细胞，附睾管各段也显著增多，尾段可见核裂解与核消失；术后１５天始很少见。结论：隐睾术后热作用影响生精过程，使受损生精细胞核分裂而脆质不分裂等形成多核细胞。术后３天出现，６天始增多，１５天后开始消失。消失方式包括，在由细精管与附睾内碎解和排出体外。隐睾术后多核的形成是热作用使生精细胞损伤后的反应性变化。
OBJECTIVE: To study the appearance, type, disappearance and biological significance of multinucleated cells in the process of testis spermatogenesis induced by heat, and provide morphological data for male anti-fertility. Methods: The testis and epididymis of rats were removed 2 ~ 70 days after artificial cryptorchidism, fixed with Bouin and Susa, and paraffin sections were observed by light microscope. Results: Three days after surgery, a few of the seminiferous tubules appeared in the seminiferous tubules as spermatocyte type and spermatocyte type. After 4 days, the nucleus of the epididymal tube showed multinucleated cells. On the 6th day after operation, most of the seminiferous tubules Tubes appear more multinucleated cells, each segment of the epididymal tube was also significantly increased, the last paragraph shows nuclear lysis and nuclear disappear; 15 days after the start is very rare. Conclusion: The postoperative heat effect of cryptorchidism affects the process of spermatogenesis, which causes the damaged spermatogenic cells to divide and the fragile cells to not divide to form multi-nucleated cells. 3 days after surgery, 6 days began to increase, 15 days later began to disappear. Ways to disappear include fragmentation and excretion in the seminiferous tubules and epididymis. The formation of multi-nucleus after cryptorchidism is the thermal effect of reactive changes after spermatogenic cell injury.