Association of prepartum blood magnesium concentration with postpartum subclinical hypocalcemia

Abstract

Advances in dairy cattle nutrition and management have been able to significantly minimize macromineral imbalances capable of contributing to the development of clinical disorders in the periparturient period. Despite these improvements, subclinical disorders still influence dairy cow health and performance, as the hormonal and metabolic challenges associated with the transition period influence macro mineral homeostasis. Although the association of subclinical hypocalcemia (SCH) with early lactation health events has been described, little is known regarding the association of prepartum magnesium status with postpartum health and production. Therefore, the primary objective of this study was to describe the association of prepartum blood magnesium concentrations with the risk of postpartum SCH development, as well as the risk of diagnosis of retained placenta, metritis, hyperketonemia, and displaced abomasum.