奶牛乳中孕酮水平和超排效果的研究

Progesterone Level in Milk ancl Superovulation (Heilongjiang Institute of Animal Science)

对12例超排供体母牛固体干奶样孕酮含量进行了放射免疫分析,研究了其与超排效果间的关系。结果指出:(1) 孕酮水平变化规律正常者,超排有效率达100%。即超排前孕酮值>12、超排期发情<10、采卵期>40ng/ml者,其黄体数均>4并获可用胚胎。(2) 超排采卵后注射PGF2α,虽孕酮有下降趋势,但未降低至发情的水平,在有效期内均未出现发情。关于缩短超排后供体的发情期问题,尚需进一步研究。

The relation between progesterone level and Superovulation was studied through radioimmunoassag of progesterone content in dry milk of 12 donor cows. The resules Show: (1) Superovulation rate is 100% while the progesterone level is normal. This means that the progesteronc value is over 12 ng/ml before ovulation, at estrus for superovulation the value below 10 ng/ml, at the ova collecting stage the value more than 40ng/ml, metoarion number over 4, and transferable embryos can be obtained. (2) Progesterone content tends to decline by injecting PGF 2α after ovulationbut still higher than the valne at estrus. Estrns does not occur coithin the effectiveness of the Chemical. To Shorten the estrus of the donor after superovulation awaits further study