Peters, C.W.; Larson, R.L.; Corah, L.R.
(Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1993)
Melengestrol acetate (MGA®) and prostaglandin
F2α (PG; Lutalyse®) were used to
synchronize estrus in 757 yearling, virgin, beef
heifers on six commercial ranches. Heifers
were inseminated artificially (AI) 12 h ...