Genetic variations in the UGT1A1 gene, especially 211 G to A (G71R in exon 1) mutation, as well as variations in the glucose-6-phosphate dehydrogenase (G6PD) and OATP2 genes, also contribute to the occurrence of neonatal jaundice and breast-feeding jaundice [36–38]. Here, G6PD is linked to Jaundice.