Profiles of progesterone in milk and clinical ovarian findings in postpartum cows with ovarian dysfunctions.

Milk progesterone profiles, based on twice or once weekly sampling, were constructed for postpartum dairy cows. The cows were simultaneously examined by rectal palpation and clinical ovarian findings were related to the progesterone profiles. The combination of progesterone analysis and clinical examination may be used to optimize diagnostic accuracy and a number of practical recommendations are given on the basis of the results from this study.