The objectives were to characterize repeat breeding in dairy cows, including reproductive performance and risk factors. Data from 613 Holstein Friesian cows in nine dairy herds across Japan were enrolled. A repeat breeder was defined as a cow that did not become pregnant after three inseminations, despite no clinically detectable reproductive disorders. In contrast, cows that became pregnant wi...

This study was designed to test the treatment with prostaglandin F2α (PGF2α) plus equine chorionic gonadotrophin (eCG) and GnRH 48 h later (PEG protocol) followed by fixed-time AI (FTAI) in dairy cows with silent ovulation (cows with a mature corpus luteum and no signs of estrus detected in the preceding 21 days). In Experiment I, ovulation following the PEG protocol monitored in 24 cows with s...

Cattle and buffalo encounter several reproductive problems during their productive life. Among various reproductive problems, Anoestrus and Repeat breeding are the two important problems which reduce fertility as well as productivity of the animals. A healthy uterus is the basis for high submission and conception rates. Vaginal discharge of animals may be turbid, thick and mucopurulent due to u...

Dairy cattle production requires great intensification, which has been demonstrated to affect negatively on the reproduction. One calf by cow and year is the reproductive objective in these animals. It means that cows must get pregnant after AI, maintain the pregnancy, have parturition after 270 days approx., and wait for a period of 40-50 days to be successfully inseminated again. Nevertheless...

Detection of bacterial biofilm in uterine of repeat breeder dairy cows Mohammad Rahim Ahmadi, Abdollah Derakhshandeh, Sadegh Shirian, Yahya Daneshbod, Maryam AnsariLari, Saeid Nazifi Departments of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran Departments of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran Department of Pathology, ...