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The aim of the study was to compare the efficiency of offspring reproduction of the new Ukrainian red dairy breed cows with the normal morphological and functional ovaries and those treated for ovarian follicular cysts. The study was performed at a pedigree reproducer of Ukrainian red dairy breed, it was an industrial dairy complex with 650 milking cows located in Odessa region during 2017–2018 years. The maintenance dairy cattle was in accordance to modern zoohygienic requirements. Total mixed ration diet with high-protein ingredients was designed to get 29 kg of milk per day, however, an actual milk yield was 19–20 kg/cow. The analysis of the blood serum biochemical content of the controlled livestock showed disorders cows metabolism at a subclinical level during all physiological periods (milking, mid-lactation, dry period). There was a significant imbalance in the level of glucose in the blood of cows (on 44.65% below the minimum level). The level of urea head also increased significantly. It was 15.91% above maximum level. Large subclinical failure in cholesterol, triglycerides, alkaline phosphatase rates have been noted also. This indicated the chronic disorders nature of protein-fat metabolism caused by protein overfeeding. As a result, follicular ovarian cysts of lactating cows (42.37%) have been diagnosed (n=177). It has been established experimentally that ovarian follicular cysts reduce cows reproductive efficiency. This resulted in a reduction of the number of newborn calves by 10,67%; an increase in prenatal losses by 15.53%; an increase in the service-period by 69.92 days; an increase in the number of repeated inseminations by 1.9 times (compared with cows with morphologically normal ovaries). The results of our studies showed that follicular ovarian cysts worsens the number and viability of offspring. 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Influence of ovarian follicular cysts on reproductive performance in the cattle of new Ukrainian red dairy breed