Abstract
Using the Ovsynch protocol to prepare cows for re-insemination proved to be very effective. Its use guarantees that all cows found open at pregnancy diagnosis are reinseminated promptly within 10 days, and the average pregnancy rate of 28.7% in 136 cows was acceptable. Pregnancy rates were not different whether or not estrus was detected in cows at the timed insemination, but they tended to be greater at second services compared to other repeat services. The Ovsynch protocol is an effective tool to use to ensure prompt re-insemination of open cows.
Highlights
SummaryUsing the Ovsynch protocol to prepare cows for re-insemination proved to be very effective
Finding cows not pregnant at pregnancy diagnosis is frustrating
Its use guarantees that all cows found open at pregnancy diagnosis are reinseminated promptly within 10 days, and the average pregnancy rate of 28.7% in 136 cows was acceptable
Summary
Using the Ovsynch protocol to prepare cows for re-insemination proved to be very effective. Its use guarantees that all cows found open at pregnancy diagnosis are reinseminated promptly within 10 days, and the average pregnancy rate of 28.7% in 136 cows was acceptable. Pregnancy rates were not different whether or not estrus was detected in cows at the timed insemination, but they tended to be greater at second services compared to other repeat services. The Ovsynch protocol is an effective tool to use to ensure prompt re-insemination of open cows. The probability of not palpating a functional CL when it is present is about 30%. The second disadvantage of using PG, even when the diagnosis of a functional CL is accurate, is that not all estrus activity after PG is observed. Too many cows are not promptly reinseminated and can become “lost” in the herd, until they are either detected in heat or later “found” in the herd after analysis of records
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