I mga heifers. Heat detect till about 84 hours then TAI non-responders and give GnRH
Bring cows in same day as I lute heifers off mga and lute them also breed anyone in heat, day 7 cidr non-responders day 14 lute them heat detect and TAI those non-responders.
Works great for me. I also use Kamars on cows. Estotect patches if I know I'm going to TAI them as they only need to be on for 4 days. Kamars I leave on untill she shows a heat.
Good luck.