EGF and polycystic ovary syndrome: The results of ROC curve in this study showed that the AUC of serum PDGF, EGF, and sFlt-1 to predict the pregnancy outcome of PCOS patients was 0.757, 0.795, and 0.737, respectively, and the AUC of the three combined to predict the pregnancy outcome of PCOS patients was 0.876.