36-Title: Determining the right time of insemination based on physiological, endocrine and biochemical fluctuations in Sahiwal cows
Authors: S Tiwari, Y Singh, R Sirohi, Mamta, A Kumar, DN Singh, BK Yadav and R Kushwaha
Source: Ruminant Science (2024)-13(1):185-189.

AbstractHow to cite this manuscript: Tiwari S, Singh Y, Sirohi R, Mamta, Kumar A, Singh DN, Yadav BK and Kushwaha R (2024). Determining the right time of insemination based on physiological, endocrine and biochemical fluctuations in Sahiwal cows. Ruminant Science 13(1):185-189.
Abstract
The present study was conducted on healthy, cyclic recently calved Sahiwal cows maintained at DDD farm of Livestock Farm Complex of the institute. Various physiological, blood-biochemical, and plasma endocrine profiles were investigated to discriminate the various stages of estrus. The stages of estrus i.e. onset of estrus, standing and end of standing heat or non-estrus have revealed a significant (P<0.01) effect on rectal temperature and respiration rate. The difference in mean plasma concentration of estrogen and cortisol in experimental Sahiwal cows during their different stages of estrus was not found to be significant. No significant change in plasma concentration of glucose, total cholesterol, total protein, urea and total immunoglobulin, were observed during different stages of estrus in experimental Sahiwal cows of the present study, all the values were within the normal range. However, mean values for alkaline phosphatase were found to be significantly higher during standing heat conditions followed by the onset of estrus and non-estrus stages of estrus in these cows.
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