Background and Objectives: Three major semen parameters that involves on male infertility are sperm count, motility and morphology. In 50% of couples referring to physicians, because of infertility, male factor, solely or accompanying with female factor is responsible of infertility. Some of drugs are used to improve the semen parameters. The goal of this study was to study the effect of pentoxifylline on semen parameters (count, motility, morphology, volume of semen).

 Methods: Sixty one patients with impairment in semen parameters were selected and semen samples requested from each participant for analysis before treatment. Then patients were treated with pentoxifyllin, 400 mg three times a day, for three months. After that we took semen specimens again and analyzed them.

 Results: Mean total sperm count in case group before treatment with PF was (17 millions) and after treatment with PF reached to (21 millions). In 68.9% of patient, Sperm count increased (p<0.001) Mean motile sperm percent in case group before treatment with PF was 19.42% and After treatment with PF reached to 28.78% and 88.52% of patient this parameter increased (p<0.001). Parameter motility showed the most important after treatment. Mean normal morphology of sperm percent in case group before treatment with PF was 24%and after treatment with PF reached to 26.39% and in 32.8% of patient this parameter increased (p<0.001).Mean semen volume in this group before treament with PF was 1.95ml and after treament with PF reached to 1.93 ml. There was no significant variation in semen volume after treament with PF. (p=0.321)

 Conclusion: Results show that Pentoxifylline has significant efficacy for increasing sperm count, motility and morphology correction (specially for sperm motility). Considering that oral PF is safe and cheap, with easy application, we can use it for improving semen parameter’s quality before performance ART.