During three months from December 1967 to February 1968, 1867 Korean native cows slaughtered in pusan abattoir were investigated for studying the incidence of cystic ovaries.
The results obtained in this experiment are summarized as follows:
1. The average frequency of cystic ovaries in 1867 Korean cows was 17 cases, or 0.91%.
2. In 17 cases 1, or 0.3%, occurred in cattle from 1 to 3 years of age; 4 or, 1.02% in four; 7 or, 2.02% in five; 2 or, 0.63% in six; and 3, or 0.63% occurred between 7 and 9 years of age.
3. The incidence of cysts in the respective ovaries, the left ovary was cystic in 23.5% of the cases, the right one in 41.2% and both ovaries in 35.3%.
4. According to the histological findings of cystic ovaries, follicular cysts were 88.2% and luteal cysts 11.8%.
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