ALTERATION OF PHYSIOLOGICAL PARAMETERS IN REPEAT BREEDER COWS

Repeat breeding is a significant reproductive problem to develop in a cattle industry in developing country. In this study, we demonstrated physiological alterations in terms of hematological, biochemical and hormonal profile being developed in repeat breeder cows. However, the biochemical profiles of 30 repeat breeders and 30 fertile cyclic cows were investigated and compared in this study. Hematological parameters (Hb, ESR, PCV etc) were measured in both cohort of animals. Serum was tested for biochemical (glucose, total protein, cholesterol, low density lipoprotein, high density lipoprotein) and hormonal (follicle stimulating hormone, luteinizing hormone, estradiol, progesterone, testosterone, thyroxine) assays using a commercially available ELISA kit after a routine blood examination. Paired T-test was used to check the significance of differences (P< .05) in blood profiles and hormonal profiles between repeat breeder and normal cycle cows. Repeat breeder cows had considerably lower total erythrocyte count, haemoglobin, platelets, blood glucose, luteinizing hormone, progesterone, and higher testosterone levels than typical cyclic cows. Overall, haemoglobin deficiency and low blood glucose concentrations possibly alters ovarian function along with lower concentrations of LH surge for ovulation. Correcting plasma glucose, Hb, LH, and testosterone levels may be an effective strategy for treating repeat breeding cows, based on the findings.