Data collection
A file including demographic and medical records was collected. Demographic data included maternal age, gravidity, parity, height, pre-pregnant weight and gestational weight gain (GWG). Besides, medical information including lipid concentrations (TC, TG, HDL-c and LDL-c) at second trimester, results of 75g OGTT, concentrations of liver enzymes (aspartate transaminase [AST], alkaline phosphatase [ALP], lactate dehydrogenase [LDH]), pregnancy complications (GDM, GH, PE), pregnancy outcomes (mode of delivery and the occurrence of postpartum hemorrhage [PPH]) and perinatal outcomes (the occurrence of LGA, SGA, and preterm birth [PTB]).