Expression of IL-6 and TGF-β in placental tissues. Fold change for IL-6 and TGF-β were calculated in control versus infected animals (a). The expression of IL-6 and TGF-β were correlated in control (b) (n = 10) and infected (c) (n = 10) placental tissues at early gestation. The data were analyzed using an ANOVA (A) or simple regression analysis (B,C). P values <0.05 were considered significant.