In our previous study, according to the regression analysis, the GG genotype in a recessive model of rs2070959 in the UGT1A6 gene showed a significant association with complications in HF patients (OR (95% CI): 4.40 (1.06–18.20), p = 0.044) (see Supplementary Table S3) [14]. This evidence concerns the gene UGT1A6 and hydrops fetalis.