IL10 and hydrops fetalis: Interestingly, serum IL-10 levels were significantly elevated in the chow animals compared to both HF (chow 7.6 ± 0.62 versus HF 5.0 ± 0.27 pg/mL, p < 0.01) and HFRS (chow versus HFRS 5.7 ± 0.46, p < 0.05) (Figure 3D).