GLIS3 and gestational diabetes: The frequencies of the A allele and AA genotype of the GLIS3 rs7034200C/A variant were significantly higher in the GDM group (45.4% and 19.5%, respectively) than in the control group (40.6% and 15.2%, respectively), with an OR of 1.278 (95% CI: 1.038–1.574; P = 0.021) for the dominant model, 1.357 (95% CI: 1.054–1.746; P = 0.018) for the recessive model, 1.217 (95% CI: 1.062–1.396; P = 0.005) for the allele model, and 1.524 (95% CI: 1.143–2.031; P = 0.004) for the CC vs. AA genotypes.