Applications Dexamethasone Injection and 15-methyl PGF2α persistent corpus luteum of cows to compare efficacy. The results show. Under the same conditions as the route of administration. 15 treatment of methyl PGF2α2 better than dexamethasone injection. But the difference was not significant (P> 005). Therefore, in the absence of 15-methyl PGF2α time. Available dexamethasone injection therapy lasting cows corpus luteum. 

Currently. Although cattle reproductive hormones also cited the advantages lasting effect luteal do other methods, but their different types of drugs, dose and route of administration. Has a direct impact on the effectiveness of treatment.