Subsequent analysis revealed an effect (P = 0.02) of treatment period for total sperm cells; treatment with omega-3 fatty acids increased (P = 0.02) the total number of sperm from 84.3 2.3 109 (mean + S.E.M.) during Weeks 0–7 to 95.6 2.3 109 during Weeks 8–15. The total number of sperm in ejaculates of control boars was 86.3 2.3 109 during Weeks 0–7, and 86.4 + 2.3 109 during Weeks 8–15.