Trials have shown that pregnancy rates can be improved by up to 19 per cent byusing triple synchronisation with PRID (3PSynch) rather than the GnRHPGF2α GnRH protocol.

The results have been published in the fourth of CEVA Animal Health’s series of fertility newsletters that are circulated free of charge to large animal veterinary practices.

A total of 75 Holstein Friesian cows from a commercial dairy farm were enrolled on the study. The 39 on the GnRH PGF2α GnRH protocol were given two injections of GnRH and prostaglandin while the 36 in the 3PSynch group had a PRID device inserted for eight days on up to three occasions. Pregnancy rates were measured following fixed time AI at the initial service period, followed by further inseminations if the cows were subsequently identified to be in oestrus.

The cows on the 3PSynch programme showed a 19 per cent improvement in pregnancy rates at the end of the trial compared to the GnRH PGF2α GnRH group. This was attributed to the fact that the 3Psynch system has the advantage of allowing fertility to be actively managed with targeted oestrus detection following PRID removal, and enables cows to be served up to three times in a 42 day period. This resulted in high submission rates throughout the entire trial period while the GnRH PGF2α GnRH group achieved initial high submission rates only.

For copies of CEVA’s previous three fertility newsletters or for further product information please contact the large animal sales team or CEVA Animal Health Ltd, 90 The Broadway, Chesham, Bucks, HP5 1EG.

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