Postpartum hypocalcaemia in dairy cows

The onset of lactation is associated with a rapid increase in calcium demand that may precipitate a failure of calcium homeostasis, resulting in subclinical or clinical hypocalcaemia. Subclinical hypocalcaemia is most common and is associated with poor subsequent productivity and poor postpartum health. Clinical hypocalcaemia affects fewer cows but, in severe cases, may be fatal. Implementation of effective strategies to optimise blood calcium concentration at calving and prepare cows for the demands of early lactation prevention is key to managing and preventing hypocalcaemia.