Physio-haematological and biochemical changes in dairy cows during different stages of estrus

Abstract

The present study was carried out to discriminate the prestanding, standing and end of standing heat
conditions of estrus Sahiwal cows by observing their various physiological, haematological, blood
biochemical attributes. The experiment was conducted on eight healthy, cyclic Sahiwal cows maintained
at DDD farm of ILFC, DUVASU, Mathura. Out of various physiological and hematological parameters
studied, a significant difference for three different stages of estrus in Sahiwal cows could be observed only
for rectal temperature, PCV (P<0.01) and hemoglobin (P<0.05). During standing heat, the mean values for
rectal temperature (39.00±0.10ºC), hemoglobin (12.45±0.20 mg/dl) and PCV (44.77±0.77 %) were found
to be significantly higher than those during pre standing and end of standing heat stages. Interestingly,
no significant difference for any of the bio chemical attributes in Sahiwal cows could be observed during
three different stages of estrus, but few of the parameters viz. total protein, alkaline phosphatase, total
immunoglobulin, albumin and calcium, significantly higher during standing heat as compared to other
stages of estrus. This finding indicated that none of the bio- chemical attributes helpful in discrimination
of the above said three stages of the estrus in Sahiwal cows.