Fig. 2

ROC curves for predicting pregnancy outcomes by serum E₂ and β-hCG levels 12 days following FET with NCs. (a) ROC curve analysis of day 12 serum E₂ and β-hCG levels following FET with NCs in Group CE; (b) ROC curve analysis of day 12 serum E₂ and β-hCG levels following FET with NCs in Group B