Progesterone concentrations in defatted milk from the cows on the day of artificial insemination and 20,21 days later, and cows having ovarian disease were determined by enzymcimmunoassay ( EIA ) .

• 用酶免疫分析法测定了正常母牛配种当天；配种后20、21天和患有卵巢疾病牛的脱脂乳孕酮浓度.