UGT1A1 and hydrops fetalis: It was observed that HF was significantly associated with the genotypes VEGFR2 rs2239702 (OR 6.08, 95% CI 1.08-34.20, P = 0.04), ABCB1 rs1045642 (OR 26.35, 95% CI 1.41-490.56, P = 0.03), ABCB1 rs2032582 (OR 0.01, 95% CI, 0-0.58, P = 0.03), UGT1A1*6 rs4148323 (OR 0.01, 95% CI 0-0.22, P = 0.01) and UGT1A9 (OR 105.10, 95% CI, 4.76-2357.78, P = 0.01).