RARRES2 and gestational diabetes: In logistic regression, higher chemerin levels were associated with increased odds of GDM (OR = 1.010; 95% CI: 1.005, 1.016), whereas higher C-peptide (OR = 0.672; 95% CI: 0.536, 0.843) and IL-6 levels (OR = 0.796; 95% CI: 0.712, 0.890) were associated with reduced odds of GDM (all p < 0.01).