FGF21 and gestational diabetes: The study also indicated higher serum FGF21 in pregnancy complicated with GDM compared to normal pregnancy at both sampling times (1st trimester: 140.8 ± 32.83 and 97.1 ± 21.43 Pg/ml for GDM and normal; 2nd trimester: 123.8 ± 41.85 and 89.4 ± 32.53 Pg/ml for GDM and normal).