Genetic analysis of calving difficulty and stillbirth in Norwegian Red cows.

@article{Heringstad2007GeneticAO,
  title={Genetic analysis of calving difficulty and stillbirth in Norwegian Red cows.},
  author={Bj\org Heringstad and Yu-mei Chang and Morten T. Svendsen and Daniel Gianola},
  journal={Journal of dairy science},
  year={2007},
  volume={90 7},
  pages={3500-7}
}
The objectives of this study were to infer genetic parameters for stillbirth (SB) and calving difficulty (CD) and to evaluate phenotypic and genetic change for these traits in the Norwegian Red breed. Stillbirth is recorded as a binary trait and calving difficulty has 3 categories: 1) easy calving, 2) slight problems, and 3) difficult calving. The overall mean frequency of SB in Norwegian Red was 3% at first calving and 1.5% for second and later calvings; mean frequency of the category… CONTINUE READING

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