Preservation of goat semen at 5°C with emphasis on its freezability and the impact of melatonin

Evaluation of goat semen, extended in Cornell University 16 extender, was used to study the effects of melatonin of various concentrations on sperm motility (SM) %, alive sperm (AS) % and sperm abnormalities (SA) % of extended goat semen stored at 5°C for seven days were studied. Melatonin at the doses of 0.0, 10.0, 15.0 and 20.0 μg/ 100 x 106 sperm was added to the extended semen and the samples were examined daily for the previous parameters. Additionally, the infl uence of melatonin on post-thawing motility was assessed.