ABCA1 and gestational diabetes: Since several polymorphisms of the ABCA1 gene affect HDL-C levels in the general population, and low HDL-C levels were associated with high BMI (obese phenotype), we further analyzed the effects of the ABCA1 gene polymorphism on clinical and metabolic parameters in GDM patients and control subjects stratified into overweight/obese (BMI ≥ 25 kg/m2) and non-obese (BMI < 25 kg/m2) subgroups.