There were significant differences in age, prepregnancy BMI, systolic blood pressure (SBP), diastolic blood pressure (DBP), glycosylated hemoglobin A1c (HbA1c), γ-GT, cholinesterase (ChE), TBA, triglyceride (TG), fasting insulin, 1- and 2-hour insulin values, fasting plasma glucose, 1- and 2-hour glucose levels, homeostasis model assessment of insulin resistance index (HOMA-IR) and homeostasis model assessment of β cell insulin secretion (HOMA-β) (all P < 0.05). This evidence concerns the gene BCHE and Insulin resistance.