Abstract: To 471 oxen, the mixed stud bull carries on enhances the conception rate the experiment. The result indicated tha the cow sentiment time conception rate and the total conception rate processes which with LRH-A respectively were 56.6% and 65.93%, and were signficantly higher than control group(24.42% and 49.21%)(P<0.05); The cow sentiment time conception rate and the total conception rate processes which with hCG respectively are 53.33% and 72.72%, and were signficantiy higher than those in the cow of control group(33.69% and 52.54%)(P<0.05).

Key words: yellow cattal; hybrid cattle; LRH-A; hCG; conception rate