The mean RV/LV expression ratio indicated a fourfold higher RV expression of IL-1R2 (HF: 4.400 ± 1.359; MCS: 4.657 ± 0.655, Figure 2B (I)) and IL-1RL1 (HF: 3.697 ± 0.876; MCS: 4.529 ± 0.584, Figure 2B(II)). Here, IL1R2 is linked to hydrops fetalis.