Comparing the Use of Intra Vaginal Progesterone Devices with Standard Ovulation Synchronisation Protocols in a Hungarian Dairy Herd

Abstract

In this study we compared the fertility of 2673 Hungarian dairy cows over 3 herds using double ovsynch protocol and progesterone supplementation reproduction protocol. Animals in these herds were treated with the double ovsynch protocol for their first insemination and if they failed to conceive, they were automatically placed on the PRID protocol, regardless of cyclicity. The device was implanted vaginally for 7 days. Empty animals after the 4th insemination were culled. On Farm 1, after the first insemination only 43.40% of cows conceived. 925 animals given DOS treatments in 2022. After the Prid-sync treatment, a further 24.35% conceived following a second insemination and 15.72% after a third insemination.