A total of 501 dairy cows were allocated sequentially to be treated immediately after parturition with either 25 iu oxytocin or 35 mg carbetocin cheap jerseys china, or to be left untreated. Any abnormal parturition, including assisted calving, the birth of twins or dead calves cheap jerseys china cheap jerseys china, retained fetal membranes or hypocalcaemia, was recorded, and the cows were examined between 28 and 42 days after calving for endometritis. Pregnancy was diagnosed from 30 days after insemination.