Abstract
Currently cattle producers in the United States are increasing their farm size for economic profit and using synchronization programs for a fixed time AI for better reproductive management. This requires insemination of large number of cows on a single day. With this trend, there is an opportunity to investigate the possibility of maintaining or improving the reproductive outcomes using fresh extended semen with low sperm numbers instead of frozen semen with high sperm numbers per insemination. The objective of this study was to compare fixed time AI pregnancy rate in Angus cross beef cows inseminated with frozen thawed or fresh extended semen.
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