Lipid measurement
Fasting blood samples were collected at gestational week 6–8, 16, 24
and 36, and non-fasting blood samples were collected at 42 days
postpartum. Serum TG, total cholesterol (TC), low-density lipoprotein
cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and
glucose levels were measured by the Hitachi type 7180 automatic
biochemical analyzer (Hitachi High-Tech Science Systems Corporation,
Yokohama, Japan) at the laboratory of Fuxing Hospital affiliated to
Capital Medical University.