INS and gestational diabetes: Sixty, 90, and 120 minutes- post-challenge glucose during MTT2 correlated with 2 h-glucose during the OGTT (r=0.633, p=0.009; r=0.782, p<0.001, and r=0.639, p=0.008).<h4>Discussion</h4>In the early second trimester, fasting insulin and C-peptide might be suitable to stratify women early for GDM risk.