While the ova are moving down the Fallopian tubes toward the uterus, about five days after super-ovulation, the cow is artificially inseminated with semen from a prize bull.

• 大约在为增加排卵而注射激素的5天后，当卵子顺着输卵管向子宫移去时，就用优种公牛的精液对母牛进行人工援精。