Some significant related factors of GDM were age (OR = 1.49, 95% CI: 1.15 - 1.19, p value < 0.05), family history (OR=3.45; 95% CI: 1.97 - 6.04; p value < 0.05), fetal death in utero with unknown reason (OR = 2.68, 95% CI: 1.19 - 6.04; p value = 0.017).