The objective of this study  was to examine the effect of the biogenic selenium  (BioRSp - fortified by selenium) on any blood’s biochemical and reproduction function indices of the sire boars. The biopreparation was introduced intramuscular, under 0.05% hydria solution in regime of 10 days, in volume of 0.3 ml/boar/day. BioRSp induced a decrease of total blood’s lipids concentration; was considerable modified metabolism of triglycerides and β-lipoproteins; on BioRSp administration end  in the II gr. (10 days x 0,3 ml/boar/day) with 13.72% given the control; β-lipoproteins in   gr. II have been increased with 11,95%, given the control; inhibited the  blood’s lipid peroxidation, on boars from II gr. DMA blood concentration was  smaller with 21.41%, given the control; compared with the control group: the ejaculate volume have been increased 13.83%  for the  II groups; spermatozoa mobility have been increased,   in the II gr. with 10.43%; farrowing rate for sows, after first insemination with the semen collected from II group boars,  have been prevailed with 4.57% control; total number of piglets born was higher given the control  with 7,7%.