King, M.; Kiracofe, G.H.; McKee, R.M.
(Kansas State University. Agricultural Experiment Station, 1981)
With heifers given two injections of Lutalyse 11 days apart, and
inseminated 80 hours after the second injection, only 20% in heat before
48 hours conceived compared with 65% that were in heat 48 to 80 hours after
injection. ...