According to the regression analysis, the mutant GG genotype of the polymorphism rs2070959 in the UGT1A6 gene was significantly associated with aspirin treatment in 26 HF patients in the 12th month of therapy [OR (95% CI): 5.10 (1.31–19.87), p = 0.018 and (OR (95% CI): 4.50 (1.05–19.25), p = 0.054)]. Here, UGT1A6 is linked to hydrops fetalis.