配种
2.A STUDY ON CONCEPTION RATE OF ANGORA RABBITS AS A RESULT OF CONCENTRATING FORCED COPULATION
5.Farmers oversee breeding to ensure the sow is receptive and successfully bred.
9.(4) The concentrate on P_4, which was up to 0.29-0.63ng/ml, of pregnancy ewe on 22-23d after hybridization was higher than that on hybridization.
10.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 ) .
