The fertility of cows under a targeted breeding program using prostaglandin F-2-alpha

The purpose of the investigations was to present the results of fertility in cows of targeted breeding program (group I, experimental, n=80) or cows under regular veterinary control (group II, control, n=34), All animals from the group I received the set up injection of prostaglandin F-2-alpha (Dinolytic) between day 24 and 38 after parturition, Only 46 (57.7%) cows developed heat, on average after 3.24 days after injection. After the first injection of prostaglandin (first breed), heat was observed in 63 (78.8%) cows after 3.94 days. From this group 36.3% cows became pregnant, After the second injection of prostaglandin and after spontaneous heats and insemination 88.8% cows became pregnant after a mean time of 87.6 days from parturition, In the control group 85.3% cows became pregnant after a mean time of 118.3 days (p<0.001). Simultaneously, the veterinary intervention required 16.3% and 61.8% cows from group I and II, respectively, Compared with more traditional programs, the prostaglandin program with the use of prostaglandin F-2-alpha may improve herd reproductive performance.