ABSTRACT
In this prospective study, the effects of unilateral operative interference on the affected side with bilateral surgery and the other clinically appearing free side were compared. The diagnoses were achieved clinically and confirmed by Doppler US, which was also used to detect a subclinical varicocele and to assess the degree of venous reflux. This comparative prospective study was based upon the results of pre and postoperative seminal analysis and Doppler studies US of venous drainage of both testes. The study included two groups of infertile males: Group I included 30 cases underwent unilateral surgery and group II included 30 cases underwent bilateral surgery. Three months postoperatively, seminal analysis of the studied cases showed an improvement in the number and initial motility as well as a decrease in the number of abnormal forms in 60% of group I and 90% in group II. Also, the study showed that there was a relation between the degree of reflux and the improvement in the seminal parameter