AMHR2 and polycystic ovary syndrome: Figure 3b illustrates the semi-quantitative results of the immunohistochemical staining and the outcomes of the pairwise comparative analysis. As depicted in Figure 2, both the endometrium of AEH in non-PCOS women and the matched control group exhibited AMHR2 protein expression, predominantly localized in glandular epithelial cells. Furthermore, as indicated in Figure 3b, the expression level of the AMHR2 protein in the AEH endometrium was significantly lower compared to that of the matched control group, with a statistically significant difference noted (p = 0.021).