AIP and gestational diabetes: Overall, women with GDM had higher levels of TG (2.05 ± 0.97 vs. 2.38 ± 1.37 mmol/L, P = 0.001), AIP (− 0.02 ± 0.20 vs. 0.08 ± 0.24, P <  0.001) and lower levels of HDL-C (2.02 ± 0.41 vs. 1.86 ± 0.42 mmol/L, P <  0.001) than that of control.