IL1A and hydrops fetalis: In addition, IL-1α was significantly lower in HF at week 8 (1.8 ± 0.3 pg/mg) compared to week 2 (4.8 ± 1.3 pg/mg, p = 0.001) and week 4 (4.0 ± 0.3 pg/mg, p = 0.001) (Figure 6).