[Evaluating the effect of smoking tobacco on some semen parameters in men of reproductive age].

Seminal fluid indexes (sperm count, motility, pH, morphology) were examined in 40 smokers and 30 nonsmokers. The sperm count and motility were lower in smokers. Smokers have also higher incidence of oligospermia compared to nonsmokers. There was no difference between pH and sperm morphology in smokers and nonsmokers. Additionally, smokers have higher levels of endogenous 17 beta-estradiol and sperm count below normal in nonsmokers. These results suggest that inveterate smoking can diminish fertility in men.