The effect of intrauterine cephapirin treatment after insemination on conception rate in repeat breeder dairy cows subjected to the progesterone-based Ovsynch protocol

摘要: Subclinical endometritis contributes to repeat breeder syndrome in dairy cows. This study evaluated the effect of intrauterine cephapirin benzathine administration after timed artificial insemination (TAI) on conception rate (CR) To determine antibiotic effects, all cows (n = 335) that had more than 3 services with no clinical abnormalities reproductive tract received same combined synchronisation protocol: an ear implant containing progestagen using Ovsynch protocol and a third gonadotropin-releasing hormone (GnRH) 7 days TAI. Cows treatment group (TRT; n 160) 12 h TAI, control (CON; 175) did not receive antibiotics. The percentage responded first (67.5% TRT, 70.9% CON) second (98.8% 97.1% GnRH was similar between groups. In addition, response TAI (88.1% 83.9% differ However, there CR 31 62 (43.8% TRT 44.0% CON; 39.4% 40.6% CON, respectively). Thus, post-TAI found be useful for potential subclinical