Oestrus detection in dairy cattle

Achieving reproductive targets in artificially inseminated cattle herds relies on oestrus (heat) detection, which can be identified directly and indirectly from behavioural changes in cows. Increased herd size and reduced oestrus expression have been linked to suboptimal detection. This article reviews current knowledge of oestrus detection and highlights the opportunities for veterinary surgeons to become further involved in its management through training, monitoring and the identification of appropriate aids for oestrus detection.