The vit will publish official breeding values of direct health traits for the Holstein and Red Holstein breed for the first time during the breeding value estimation April 2019. We would like to introduce the RZrepro today.
RZrepro specifies the complex regarding reproductive disorders like ovarial disorders, metritis and retained placenta. Whereas traits like retained placenta and metritis are seen directly after calving in the beginning of the lactation, ovarial cycle disorders like cysts for example occur later in lactation. Reproductive disorders in later lactations, as well as losses due to infertility have a closer genetic relationship to the existing RZR (daughter fertility). So new aspects are considered with reproductive disorders occurring early after calving which could hardly been improved by indirect selection so far.