TCF7L2 and gestational diabetes: For example, in a study of Chinese women, some genetic variants were found to be associated with the risk of GDM, such as the rs7903146 polymorphism of the TCF7L2 gene, which was associated with GDM susceptibility in the overall population as well as in white, Hispanic/Latino, and Asian subgroups, with Asians having the highest risk of carrying the TT homozygous allele (46).