We did not find any risk of GDM associated with CDKAL1 (rs7754840) and CDKN2A/2B (rs10811661) (p value ≥ 0.0301–0.753), however, in previous GWAs studies those two SNPs were found to be related to T2DM [14, 16, 27]. Here, CDKN2A is linked to type 2 diabetes mellitus.