A comparative analysis was carried out of sperm cell density, proportion of mobility and viability, and the proportion of morphologically abnormal sperm cells in 80 (74.6%) men with varices of the spermatic cord and 88 (52.4%) men without the varices. A significant shortening was observed of the viability time od the sperm cells, measured by the ability to maintain motion, in 57.5% of sperm samples from men with varices of the spermatic cord and in 39.8% of sperm samples from men without the varices. The shorter viability time was correlated with lower sperm cell density (20 million/ml) in the sperm samples. In endosonographic examinations performed at the same time, a coexistence was observed of varices and endosonographic changes in the prostate, seminal vesicles, and in a small proportion in the testicles. The coexistence of endosonographic changes and the varices was more frequently associated with decreased sperm cell density. The usefulness was demonstrated of sonographic examinations in the diagnosis and treatment of impaired fertility in men.