Classification of the potential breeding ability of range beef bulls based on semen quality parameters in samples collected by transrectal massage—A comparison of the Swedish and Canadian systems

This experiment was conducted to compare the accepted Field system of bull breeding soundness evaluation (BBSE) utilized by veterinarians in Canada with the centralized Swedish (Lab) system. To be classified as a satisfactory potential breeder, both systems require that bulls must have ≥70% morphologically normal sperm; however, minimum progressively motile sperm (≥60% – Field; ≥30% – Lab) and maximum sperm class abnormalities proportions differ (