By Sandy Johnson, extension beef specialist, Colby
Twenty plus years ago, when ovulation synchronization protocols first produced industry acceptable pregnancy rates from a single fixed time insemination there was concern if the three handlings needed would still be viewed as too much hassle. The 2017 NAHMS survey shows use of AI trending up compared to earlier surveys, especially in herds sizes of 200 or more and in the Central region. Now after years of good success, would a protocol with an additional handling be worth it? The level of “hassle” for an AI program differs for each operation based on several factors but includes facilities and labor and perhaps attitude towards working cows. This article reviews data from synchronization protocols using 3 or 4 handlings. Continue reading “Is Newer Better? The 7 & 7 Synch Protocol”