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Pregnancy Rates In Beef Cattle Artifically Inseminated With Frozen-Thawed Aged Beef Semen, David Barry Carwell
Pregnancy Rates In Beef Cattle Artifically Inseminated With Frozen-Thawed Aged Beef Semen, David Barry Carwell
LSU Master's Theses
The duration of frozen semen storage had no effect on pregnancy rates (60%, 61% and 61%, respectively) in Angus females inseminated with semen from 25 Angus bulls from Time Frames 1 (1960-1975), 2 (1976-1991) and 3 (1992-2006). Pregnancy rates were not different for beef females inseminated with semen from Time Frames 1, 2 and 3 (55%, 62% and 55%, respectively). There were no differences for total and progressive sperm motility across Time Frames 1 (42% and 29%), Time Frame 2 (51% and 38%) and Time Frame 3 (55% and 41%) and percentage of normal and abnormal sperm from bulls in …