Thus it can be seen, according to the time of P4 valley value or E2 peak value in the ewe circumference blood serum, may estimate its ovulation time, transfuse semen at the right moment and obtain the ideal conception rate.

• 由此可见,依据发情母羊外周血清中P4的谷值或E2峰值的出现时间,可以估测其排卵时间,适时输精,从而获得理想的受胎率。