PDF(Pubmed)
Abstract：
This retrospective study aimed to evaluate the performance of hormone treatment protocols, determine the factors associated with pregnancy success after hormone treatment, and compare the cost-efficiencies of two types of hormone treatment among cyclic and noncyclic anestrous dairy cows. The clinical records of 279 anestrous cows that received hormone treatment for artificial insemination (AI) from 64 herds in the western region of Thailand were obtained from Kasetsart University Veterinary Teaching Hospital from January to August 2017. The performance of the hormone treatment protocols, fixed-time AI (TAI) and estrus detection before AI (EAI), showed that the pregnancy risk for the TAI protocol was higher than that for the EAI protocol, but pregnancy per AI did not differ significantly between the two protocols in cyclic and noncyclic cows. Multivariate logistic regression analysis showed that cows receiving the TAI protocol were more likely to be pregnant compared to those treated with the EAI protocol. Cows with a 3.00 body condition score (BCS) < 3.75 after treatment and loose-housed cows were more likely to become pregnant. Treatment during winter showed higher pregnancy success than that in the summer and rainy seasons. The cost-efficiency analysis showed that the TAI protocol was the most cost-efficient option for noncyclic cows, whereas the EAI protocol was the most cost-efficient option for cyclic cows.
摘要：
这项回顾性研究旨在评估激素治疗方案的性能，确定激素治疗后与妊娠成功相关的因素，并比较了循环和非循环发情奶牛中两种激素处理的成本效益。2017年1月至8月，从Kasetsart大学兽医教学医院获得了来自泰国西部地区64群接受激素治疗进行人工授精（AI）的279头发情母牛的临床记录。激素治疗方案的表现，固定时间AI(TAI)和AI前发情检测(EAI)，显示TAI方案的妊娠风险高于EAI方案，但在周期和非周期奶牛中,两种方案的每AI妊娠没有显著差异.多变量逻辑回归分析显示,与用EAI方案处理的奶牛相比,接受TAI方案的奶牛更可能怀孕。在治疗后具有3.00身体状况评分(BCS)<3.75的母牛和松散饲养的母牛更可能怀孕。冬季治疗的妊娠成功率高于夏季和雨季。成本效率分析表明，TAI协议是非循环奶牛最具成本效益的选择，而EAI方案是循环奶牛最具成本效益的选择。
