I've been breeding 60-66 hours after pulling CIDR and shot of lutalyce. Spoke to a guy a while back that said there was no reason to not put the semen in at 54 hours. Said it didn't matter if it was heifer or cow. The guy that recommended this knows way more than I do about AI cattle. My select guy recommended 60-66 hours. Would I have better results with 54 hours? Been getting roughly 50% success so far. Thanks!!