GSTM1 and gestational diabetes: The patients with GDM had significantly higher ALT (p < 0.001), TC (p = 0.002), TG (p < 0.001), HDL-C (p = 0.039), and AG (p < 0.001) compared with the control group, but significantly lower TB (p < 0.001), TBA (p < 0.001), Cr (p < 0.001), UA (p < 0.001), Hb (p < 0.001), TP (p < 0.001), Alb (p < 0.001), GA (p < 0.001), and HbA1c (p < 0.001) (Table 1).