Dairy Synchronization: A Learning Experience - Part 3

By Brooke Schultz, Communications Coordinator, CRI 

After learning about waves and magic, we’ve come to the last part of synchronization (I know, I know – finally). No discussion of synchronization would be complete without talking about Resynch. This is an important aspect of synchronization because not all cows become pregnant at first breeding and require at least one resynchronization to conceive. 

Resynch is applied around a non-pregnancy diagnosis and helps to quickly returns the animal to another timed A.I. Resynch helps to shorten the number of days between inseminations and improve the efficiency and profitability of an operation. There are several dairy Resynch methods to choose from.

Now, how does Resynch shorten the number of days between inseminations? Since not all cows become pregnant after first insemination, this leaves a number of animals open. The earliest time they can be re-inseminated is when they return to heat at around 21 days. Those that do express heat at this point are re-inseminated at the most optimum time (which probably turns out to be the most inconvenient time for you, of course). Here is where the challenge lies, however, because a significant number of cows do not display estrous before pregnancy diagnosis. Thus, an alternative method, Resynch and its series of injections, must be used if you want to reach peak reproductive efficiency.

When properly implemented, Resynch permits timed A.I. to occur as soon as three days after a non-pregnancy diagnosis on all animals confirmed open. Yes, you read that right – three days! This leads to cows being rebred in a timelier manner and shortens span between inseminations. As a result, Resynch improves the efficiency of a reproductive program and thus improves profitability of an operation.

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Resynch permits timed A.I. to occur as soon
as 3 days after non-pregnancy diagnosis!

With all that being said, synchronization seems like a no-brainer in many situations. An operation is only as successful as its profitability, and an operation is only as profitable as the quality of its livestock, and the only way a producer can improve the quality of his livestock is by breeding and re-breeding in a timely fashion (and using Genex genetics, of course).