author(s)
Ani S Das

abstract
The study assessed the influence of certain haematological and blood biochemical parameters in crossbred cows. The levels of Haemoglobin, PCV, Serum phosphorous, blood glucose, total serum protein and total serum cholesterol were 10.06±0.61, 31.00±1.33, 4.85±0.34, 46.10±3.19, 7.00±0.99 and 95.09±8.67 in normally fertile cows. In cows with impaired fertility which were deficient in different constituents, the corresponding levels were 6.86±0.075, 21.50±0.50, 3.65±0.068, 31.13±0.726, 4.57±0.30 and 71.36±1.66 respectively, all of which were significantly lower than their corresponding levels in normally fertile cows (P< 0.10). The overall conception rate was 81.80 percent in normal group, whereas that was 11.11 only in impaired fertility group. Conception level of cows with lower level of Hb was significantly lower than that of cows with normal level (P< 0.05). Similarly, conception rate of cows with low level of PCV was also significantly lower compared to that of normal cows. There was statistically significant reduction in conception rate of animals with low levels of serum phosphorous (P< 0.01), blood glucose and cholesterol (P< 0.01). The results of present study proved that certain haematological and blood biochemical parameters have definite influence on fertility in cows.