UGT1A6 and hydrops fetalis: Out of twenty-one SNPs, five genotype polymorphisms rs8050894, rs9934438, rs9923231 in VKORC1 gene, rs5918 in ITGB3 gene, and rs2070959 in UGT1A6 showed significant differences in the distributions of allelic and genotype frequencies between HF patients, healthy controls, and HF patients with/without complications (p < 0.05) (Supplementary Tables S5 and S6).