INS and gestational diabetes: Equally, fasting serum insulin (mcUI/mL) was significantly higher in women with GDM at 24-28 GW (10.0 ± 6.5 vs. 7.9 ± 5.3, p = 0.003), but no different from women with NGT at 36–36 GW (13.3 ± 19.6 vs. 12.0 ± 16.1).