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). The gene discussed is IL10; the disease is endometritis.