Furthermore, the GlyA level did not show a linear correlation with the FPG (R2 = 0.021; P = 0.245), 1-h (R2 = 0.002; P = 0.711) or 2-h postprandial plasma glucose (R2 = 0.013; P = 0.349) in women with GDM at 24–28 weeks of gestation. The gene discussed is SHMT2; the disease is gestational diabetes.