The objective of the study was to evaluate the concentrations of the following proinflammatory cytokines: TNF-α, IL-6, anti-inflammatory cytokine IL-10, and acute phase proteins – Hp and SAA in the serum and uterine washings of cows with subclinical endometritis and healthy animals in the late postpartum period (60 DPP). This evidence concerns the gene TNF and endometritis.