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A Comparison Of Three Estrous Detection Management Schemes For Dairy Heifers, Ann Lagerstedt
A Comparison Of Three Estrous Detection Management Schemes For Dairy Heifers, Ann Lagerstedt
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Heifers should represent the greatest genetic potential within a dairy herd. To maximize this potential, heifers must be inseminated to proven sires, a practice requiring management changes on many dairies. Holstein heifers (n=115) were allotted to one of three groups to compare alternatives to daily estrous detection that may facilitate the management of a program of artificial insemination for heifers. Group 1 heifers (Controls) received no treatment but were observed twice daily for signs of estrus. Group 2 heifers (2X-PGF) were synchronized with two injections of prostaglandin F2 alpha given 11 days apart and observed for estrus. Group 3 heifers …