RESUMEN
The objective of the present study was to evaluate sperm quality and reproductive hormonal level in an unselected population of men who were permanent residents of the Yakutsk city and compare the semen and hormonal parameters with the World Health Organization (WHO, 2001) recommended normal values and the results from other countries. A total of 145 men (mean age 24,1 years) agreed to be included in the study. All the volunteers completed a questionnaire, received a general and reproductive health examination by an andrologist, gave semen and blood samples. We found that the means were 34,69 - 106 spermatozoa/mL for sperm concentration and 39,6% for total motile spermatozoa. Among all volunteers studied 4,3% had azoospermia, 27,0% reported oligozoospermia, 68,1% - asthenozoospermia. There are no differences between Yakut and Slavs in anthropometric, hormonal or sperm measures, but height and ejaculate volume were higher in Slavs than Yakut men. The data obtained indicated high frequency of suboptimal quality of sperm in males of both nations from this Siberian region in comparison with other Russian regions or European countries.