Donaldson L E
Aust Vet J. 1977 Feb;53(2):78-81. doi: 10.1111/j.1751-0813.1977.tb14890.x.
Causes of reproductive loss in beef cattle AI programs were inadequate oestrus detection, use of vasectomised bulls, reduced inseminator efficiency, inadequate nutrition and infectious reproductive diseases (vibriosis and IPV). Nine case histories were presented detailing the symptoms and diagnosis of low reproductive performance.
肉牛人工授精项目中繁殖失败的原因包括发情检测不足、使用输精管切除的公牛、输精员效率降低、营养不足以及传染性生殖疾病（弧菌病和传染性脓疱性阴道炎）。文中给出了九个病例记录，详细说明了繁殖性能低下的症状和诊断情况。
