IL6 and endometritis: The data shows that the levels of TNF-α (p < 0.01), IL-6, IL-10 (68.73 ± 12.15 pg/ml), as well as acute phase proteins (SAA and Hp) in the serum of cows with subclinical endometritis were significantly higher compared to healthy cows (IL-10 53.59 ± 3.19 pg/ml) (p < 0.001) (Fig. 1a and b).