RESUMEN
to compare the quality of semen between smokers and non-smokers in infertile men in Saudia Arabia. Materials and this is a prospective study performed in the Infertility Clinic of the Maternity and Children's Hospital in Riyadh Medical Complex in Riyadh. One hundred semen samples were collected from infertile Saudi Arabian males who were smokers and non-smokers. Semen analysis was done according to WHO recommendations. a higher percentage of primary infertility [57%] was observed in the smoker group. In the non-smoker group, there was more secondary infertility [55%]. The age range from 26-30 years predominated in both groups. Sperm count and total sperm count were significantly lower in the smokers compared to non-smokers, but semen volume and motility were not significantly reduced in the smoker group. Normal spermatozoa with abnormal semen parameters [18 percent] was the main cause of male infertility in the smoker group whereas in the non-smoker group it was asthenozoospermia [27%]. s significant difference in sperm concentration between the smoker and non-smoker groups observed, but there was no significant difference in other seminal parameters analyzed. This observation could be due to the effect of smoking