Materials and Methods: A total of 100 patients with varicocele were enrolled into the study. Semen analyses were performed after 2 and 5 days of sexual abstinence. These patients were divided into two groups based on the results of semen analysis as oligoasthenoteratozoospermia (Group 1) and normal semen analysis (Group 2). Additionally, 100 fertile cases without any scrotal pathology were accepted as the control group (Group 3), and semen analysis was also performed in these cases. Seminal plasma EGF and TGF-β levels were measured with ELISA. Additionally, serum gonadotropin and serum sex steroid levels were measured in patients and controls. Statistical analysis was performed by using one-way ANOVA test and post hoc Bonferroni test.