We showed that the genotype polymorphisms of rs9934438 and rs9923231 in the VKORC1 gene, rs5918 in the ITGB3 gene, and rs2070959 in the UGT1A6 were significantly associated with complications (thrombosis and bleeding) in HF patients (p < 0.05) [11]. The gene discussed is UGT1A6; the disease is hydrops fetalis.