High ligation of the spermatic veins has no effect on fertility and can treat patients who are experiencing inability to have children because of varicose veins. So it is a procedure to treat fertility difficulties rather than a procedure that causes fertility difficulties. The procedure is often performed by ligating the internal spermatic vein at a high level, and the spermatic cord can be drained through the external vein, so there is no abnormal semen quality in the testicles due to lack of blood after ligation. On the contrary, after ligation, the varicose blood vessels gradually return to flow, which will cause the temperature of testicular sperm production to return to normal, instead of out in this high temperature environment, or cause there to be some metabolic products, which will then affect the quality of semen, resulting in the infertility of patients. So clinically, for patients with varicocele who have abnormal semen quality, they need to undergo high level ligation of the internal spermatic vein to restore the semen quality to normal and thus restore their fertility.