The presence of the risk alleles of CDKAL1 SNPs, rs7754840 C allele and T allele of rs10811661 of CDKN2A/B SNP were relatively not higher in GDM patients than in the NGT group and the logistic regression analysis yielded non-significant odds ratios implying that the variant alleles did not show risk for developing GDM. This evidence concerns the gene CDKN2A and gestational diabetes.