Figure 1.

(A1-D3) Representative images of histological changes in endometrial tissues collected from non-PCOS patients (A1-A3), PCOS patients without hyperplasia (B1-B3), PCOS patients with simple hyperplasia (C1-C3), and PCOS patients with complex hyperplasia (D1-D3). The endometrial tissue sections were stained with hematoxylin and eosin. Enhanced magnifications are shown in A3-D3. The blue rings indicate the secretory epithelial cells, the yellow arrows indicate the apoptotic bodies, and the black stars indicate infiltrated stromal cells in the endometrial gland. Epi, epithelial cells; Str, stromal cells. Scale bars (100 μm) are indicated in the photomicrographs.