Comparison between CC and CH cows showed statistical differences only for time +3 w where the concentrations of IL1 in Fx (1.05 ± 0.01 pg/ml) and in Ut (0.065 ± 0.01 pg/ml) of CC cows were significantly higher (P = 0.005) than in the Fx (0.038 ± 0.019 pg/ml) and in the Ut (0.035 ± 0.016 pg/ml) of CH cows (Figure 3). The gene discussed is IL1A; the disease is cyclic hematopoiesis.