TCF7L2 is associated with susceptibility to GDM independently of the T1D‐risk HLA‐DQB1*0602 allele, autoantibodies to pancreatic β‐cells, and other factors (e.g., maternal age, number of pregnancies, familial history of diabetes, and other genotypes). The gene discussed is TCF7L2; the disease is type 1 diabetes mellitus.