Selenium supplementation improves testicular characteristics and semen quality of Saanen bucks

The objective of this study was to determine the effect of orally supplemented sodium selenite on body weight, testes measures, semen attributes and hormone concentrations of Saanen bucks. Twenty mature healthy Saanen bucks were divided into two equal groups (10 bucks). The treatment bucks received sodium selenite at 10-day intervals for ninety days. Body weight and testicular measurements were recorded at 10-day intervals. Fresh semen analysis was performed weekly. Body weight, testes and scrotal parameters of bucks were significantly (p < 0.001) different between the groups. The testes length and left testis thickness were not affected by treatment. The semen pH was significantly (p < 0.001) different between the groups. Moreover, the ejaculate volume, sperm mass activity, progressive motility and normal morphology were increased (p < 0.001) in selenium (Se) supplemented group compared to the control. The plasma glutathione peroxidase (GSH-Px), luteinizing hormone (LH), testosterone and selenium concentrations were significantly (p < 0.001) higher in Se supplemented group. No trace of plasma Se was found in control group, therefore its supplementation proved to be beneficial. It can be concluded that supplementation with sodium selenite improved testicular parameters and semen quality of Saanen bucks. In addition, Se supplementation increases the concentration of GSH-Px, LH and testosterone in Saanen bucks.