| [Objective]Dystocia is a common disease in breeding cows, which not only harms the health of cows, calves, but also leads to the decrease of reproductive ability and development of the cattle industry..
[Methods]On Wanfang data, CNKI , Elsevier SD database and Web of Science, the relevant cases in China were searched accurately with the keywords "dystocia", "case" and "cattle". The number of cases after screening was counted, and the causes of cow dystocia were counted and analyzed.
[Results]The total number of cases of dystocia in cows was 753. The most common cause of dystocia was fetal dystocia in 525 cases (69.72% (95%CI 66.3-73.0)), followed by abnormal birth canal (pelvic deformity caused by fracture, abnormal birth canal caused by cervical, vaginal and vaginal stricture) in 89 cases (11.82% (95%CI 9.6-14.3)).There were 41 cases of contraction and weakness, accounting for 5.44% (95%CI 3.9-7.3), 38 cases of uterine torsion, accounting for 5.05% (95%CI 3.6-6.9), 26 cases of incomplete opening of cervix, accounting for 3.46% (95%CI 2.3-5.0), 18 cases of malnutrition, accounting for 2.39% (95%CI 1.4-3.8), 9 cases of twin dystocia, accounting for 1.20% (95%CI 0.5-2.3), and 7 cases of dystocia caused by human and other factors, accounting for 0.93%(95%CI 0.4-1.9). And most of the cases are concentrated in Guangxi, Yunnan, Heilongjiang and Jilin. Basically all cows can survive, but the survival rate of calves varies greatly due to different causes of dystocia.
[Conclusion] The main factors causing cow dystocia are fetal dystocia and abnormal birth canal. In clinical practice, veterinarians should quickly and accurately determine the cause of dystocia in cows, and take corresponding delivery measures to reduce economic losses. |