奶牛脱脂乳孕酮水平与繁殖状态的监控

Studies on Progesterone Concentrations in Defatted Milk and Reproduetive Status in Dairy Cows

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.根据配种当天脱脂乳孕酮水平进行发情鉴定,具有明显的临床意义.用20天、21天孕酮浓度判断空怀的准确率分别为86.96％和94.12％,判断妊娠的准确率分别为79.27％和89.00％,估测的早期胚胎死亡率为8.89％.15-甲基PGF_(2α)治疗黄体囊肿和持久黄体的效果与治疗的孕酮浓度呈正相关,治疗有效牛在治疗前后孕酮浓度差异极显著(P<0.001).

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 ) . Oestrus predication using the EIA progesterone test was beneficial.The accuracies of diagnosis for non-pregnancy were SG.93% and 94.12% respectively, for pregnancy were 70.27% and 80.00% respectively according to the progesterone concentrations on days 22 and 21 after AI. The estimated rale of early cmbryo death was 8.89%. Treatment effect of persistent lutcal function with 15-methyl prostaglandin F2 α was correlated positively with the progesterone levels. Progesterone concentrations in defatted milk from the cows treated effectively was significantly different before and 3 days after PGF2 a injection ( P <0.001 )