In 6 out of 12 locations, cows that
received the 5-day CO-Synch þ CIDR protocol had greater
AI pregnancy rates than cows that received the 7-day COSynch
þ CIDR protocol, and in 3 out of 12 locations, this
resulted in economic benefit. Due to vast variations in the
economic benefit, it would be prudent to consider the resources
available before implementing a synchronization
protocol.