TNF and hydrops fetalis: A comparison of intestinal inflammatory factor levels between the two groups revealed that the levels of IL-1β, IL-4, IL-6, IL-17 A and TNF-α in the HF group were much higher than those in the control group (p < 0.05), whereas the level of IL-10 in the HF group was lower than that in the control group (p < 0.05) (Table 2).