[The effect of HCG-progesterone combination therapy in cows with ovarian cysts]

Eighty-one cows with ovarian cysts were treated with one group receiving 1500 IU HCG/150 mg progesterone and the other group receiving 5000 IU HCG/300 mg progesterone. A second examination was performed two weeks later. Milk progesterone levels were determined both initially and at the follow-up examination. No significant relationships were observed between firmness of the wall of the cysts as well as other clinical signs and the progesterone values. The examination two weeks later revealed similar findings for both treatments with a great variability within the groups. Normal ovarian activity was observed in slightly more than half of the animals. The discussion of the findings also considers the high tendency of ovarian cysts for spontaneous regression.