Holz, J.P.; Houghton, P.L.; Spire, M.F.
(Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1993)
Gonadotropin-releasing hormone (GnRH)
was administered to a group of 13- to 14-
month-old Angus and Angus crossbred repeat-breeding
heifers at the time of the second or
third artificial insemination to determine ...