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The objective was to determine reproductive performance following AI in beef heifers given estradiol to synchronize ovarian follicular wave emergence and estradiol or GnRH to synchronize ovulation in a two-dose PGF-based protocol. In Experiment 1, 561 cycling (confirmed by ultrasonography), Angus...

Martínez, M. F.; Kastelic, J. P.; Mapletoft, R. J.
Elsevier Science Inc., New York, USA
Theriogenology, 2004, 62, 1/2, pp 363-372