Comparison of three different programs of ovulation synchronization in the treatment of bovine ovarian cysts

Dairy cows with ovarian cysts are reduced in their fertility performance. Several programs of ovulation synchronization to treat this pathological ovarian condition with various outcomes have been published. Thus, afield study for the comparison of three selected protocols ( [a] modified ovsynch protocol with contemporaneous application of GnRH and PGF(2 alpha) at the beginning of the treatment, [b] conventional ovsynch protocol, [c] modified ovsynch protocol using PRID) with subsequent time-fixed insemination relating to treatment success was conducted. Factors with a possible influence such as number of lactation, daily milk yield or season were considered. In this investigation, pregnancy rates after one treatment cycle of [a] 19.3, [b] 35.3 and [c] 30.7 %, respectively, were achieved. Cows in their first lactation and cows with a daily milk yield over 40 kg achieved better results by using PRID. Nevertheless, the risk factors for the development of ovarian cysts have to be reduced by the herd management to achieve a sustainable increase of fertility performance.

VIVO