Cystic ovarian disease (COD) was studied in a closed 300-cow dairy herd, using Dairy Herd Improvement Association and individual health records for a 7-year period (1974-1980). There were 2,112 calving by 649 cows during the period. Cysts were found in 130 cows. Of the 649 cows that calved, 110 (16.9%) produced at least 1 daughter in which COD developed. Two bulls sired 17.6% of the daughters with COD, which was more than anticipated inasmuch as they sired only 11.6% of all daughters (P<0.05). These bulls were removed from the breeding program in an attempt to reduce COD in the herd.
|Original language||English (US)|
|Number of pages||3|
|Journal||Journal of the American Veterinary Medical Association|
|State||Published - 1982|
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