IL6 and hydrops fetalis: Serum TNFα and IL-6 in the HF-P group were decreased compared with those in the HF group (TNFα: 316.13 ± 7.62 EU/mL vs. 355.59 ± 8.10 EU/mL, p < 0.01; IL-6: 51.78 ± 2.35 EU/mL vs. 58.98 ± 2.59 EU/mL, p < 0.01) (Figure 9).