INS and Polyhydramnios: ROC analyses demonstrated that 2-hour OGTT values showed the strongest predictive performance for polyhydramnios (AUC up to 0.816) and insulin requirement (AUC up to 0.808), whereas the 50 g screening test showed only moderate discrimination.<h4>Conclusion</h4>The one-step 75 g OGTT increases diagnostic labeling without improving short-term clinical outcomes.