Cytological screening of the cows with disturbances in productive ability

The determinants of nonconstitutional karyotypic variability were revealed in cows with normal productive ability and with different disturbances during calving and pregnancy. The cyto-genetic analysis has revealed the sharp raising the anomalies frequency in cows which had at least one abort case at early or middle periods in the pregnancy (as compared with animals without reproductive disturbances). It was shown that cytogenetic anomalies in cows can characterize adequately their productive ability.