Level of reproductive function and protection factors of clinically healthy cows and cows sick with the endometritis

Abstract

Infertility is known to occur due to various genitalia diseases, which develop most often at the time of delivery and in postnatal period. New technologies of animals’ maintenance and increase in animals’ productivity led to changes in metabolism process in animals. Results of gynecology medical examination of 350 cows from the farms of Chuvash Republic show that most common forms of infertility are alimentary and symptomatic. From among the examined cows infertility was found in 32-54%, 1240% of cows had diseases related to obstetrics and gynecology. Retention of placenta was registered in 12-36% of cows, endometritis in 12-34.7%, sub-involution of uterus in 9-21%. In normal course of childbirth and postnatal period, 70% of animals got pregnant again within 90 days after the delivery date against 13.4% of cows, which had pathologies in childbirth and in postnatal period. The rate of fertilization in group with normal course of childbirth and postnatal period was 22.8% higher than in group with pathologies. Infertility period in cows from the first group was 29.6±1.8 days shorter and index of fertility was 2.9±0.3 while index of fertility in cows from the second group was 3.0±0.2. Higher count of erythrocytes and hemoglobin in blood of clinically healthy cows after the delivery is explained by high cellular reaction providing protection of the body against diseases. Decrease in these blood parameters in cows with pathology is explained by weakening of protective forces of the body and can be viewed as the response to the development of pathology. Fast increase of leukocytes in cows with endometritis on days 16-30 after the delivery should be considered as the marked reaction to inflammatory process.