The results showed that the expression level of HIF3A (0.493 ± 0.115), but not HIF1A (1.187 ± 0.327) or HIF2A (1.097 ± 0.228), was significantly decreased in omental tissues from GDM patients (Figure 1a), which indicated that HIF3A expression level might have a negative correlation with GDM development. This evidence concerns the gene EPAS1 and gestational diabetes.