MGA is not currently approved for use to synchronize estrus in mature beef cows on pasture. Even if it were available for use, the MGA-PG system would be difficult for most producers to use in their spring-calving cow herds because of the length of time the protocol demands and in most states cows will be or are about to begin grazing cool-season grasses. MGA-PG protocol to synchronize estrus in heifers works extremely well.
FAQ #28596
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Can I use the MGA-prostaglandin protocol to synchronize estrus in my mature cows?
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