Defining and Diagnosing Postpartum Clinical Endometritis and its Impact on Reproductive Performance in Dairy Cows

摘要

The objectives of this study were to validate diagnos- tic criteria for clinical endometritis in postpartum dairy cows and to measure the impact of endometritis on reproductive performance. Data were collected from 1865 cows in 27 herds, including history of dystocia, twins, retained placenta, or metritis. All cows were ex- amined once between 20 and 33 d in milk (DIM) includ- ing external inspection, vaginoscopy, and transrectal palphation of the cervix, uterus, and ovaries. All cows were followed of a minimum of 7 mo or until pregnancy or culling. Survival analysis was used to derive a case definition of endometritis based on factors associated with increased time to pregnancy.