We did not confirm associations with GDM of loci connected to GDM elsewhere, including variants in the HKDC1 (rs10762264), GCK (rs1799884), KCNJ11 (rs5219), IGF2BP2 (rs4402960), TCF7L2 (rs7903146), CDKAL1 (rs7754840), FTO (rs9939609) and IRS1 (rs1801278). Here, TCF7L2 is linked to gestational diabetes.