This study is aimed at studying the effectiveness of using the "CO-Synch" scheme with subsequent resynchronization in beef cows of the Aberdeen-Angus breed. The fatness, age of animals and calving season of Aberdeen-Angus cows raised in the conditions of Pripyat Polesie were selected as indicators that determine the reproductive ability. It was found that the use of artificial insemination in combination with the scheme of synchronization and stimulation of sexual hunting "CO-Synch" contributed to fruitful conception in 33.7% to 41.3% of Aberdeen-Angus cows. An increase in the fatness of the animals led to an increase in fertilization from 28.0 %, in cows with an indicator below 4 points, to 67.0% at cows with an indicator of 6 points or more. A third of the cows were diagnosed with reproductive system disorders. The best fertilization rate (62.5-75.0 %) was observed in animals 6-7 years of age. The largest number of calves of 35.2% was received in the spring period. The pregnancy in cows was present in 75.0% of animals calved in winter, 68.8% - calved in summer, 57.9% – calved in autumn and 48.8% - calved in spring.