The results showed that the mRNA expression of IL-12 and TNF-α in the spleens (Figure 5A) and placentae (Figure 5D) were highly transcribed, but expression of TGF-β1 mRNA was dramatically dampened (Figures 5B,E) in the animals of RHΔrop16-inoculated mice, when compared to the RH WT infection group. Here, TGFB1 is linked to infection.