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Knobbed spermatozoa in two Normande bulls
Abstract:
Two unrelated yearling Normande bulls in a bull stud had 26 and 18% knobbed spermatozoa as well as other major sperm abnormalities. One of the bulls was eliminated from the bull stud because of poor semen quality and growth performance. The other bull was maintained for additional semen evaluation, during which time the mean percentage of major sperm abnormalities decreased, indicating amelioration of a transient testicular degeneration.