Dsth said:the GnRH isn't a big deal. some years I use it and some years I do not. have not noticed any difference between the two. If you see any signs of heat like clear mucus discharge or her walking around smelling other cows, you can breed and hope for the best. if no signs, I would insert a CIDR and lute.
I gave her GnRH and then lute 7 days later and she still never came in so I AIed her 72 hours after lute