SHBG and gestational diabetes: FINS and SHBG were found to be independent protective factors for GDM (OR=0.463, 0.801, P<0.05), whereas, HbA1c, TG, FFA, and gestational BMI were found to be independent risk factors for GDM (OR=1.992, 4.234, 1.990, 1.629, P<0.05).