In fact, when the GDM patient population and controls were considered together, there were no statistically significant differences in serum FGF19 or FGF21 levels between lean (n = 72, FGF19: 100.16 pg/ml; FGF21: 79.56 pg/ml; BMI<25 kg/m2) and overweight (n = 18, FGF19: 93.10 pg/ml; FGF21: 84.66 pg/ml; BMI≥25 kg/m2, P>0.05) subjects. Here, FGF21 is linked to gestational diabetes.