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. 2023 Jan 19;13(3):382. doi: 10.3390/diagnostics13030382

Figure 4.

Figure 4

Histological evaluation of the endometrium. (A) the surface shows simple columnar epithelium and the endometrial coiled glands during the first phase of the menstrual cycle; (B) the lamina propria is rich in blood vessels and intercellular substances during the first phase of the menstrual cycle; (C) the second phase of the menstrual cycle upon undergoing progesterone treatment showing numerous endometrial glands compared to those in (A) (1st phase of cycle), with a high number of cells in the stroma; (D) the second phase of the menstrual cycle upon undergoing progesterone treatment columnar epithelium; (E) the endometrium of a PCOS patient. Note the cell-rich lamina propria is slightly more developed than in (A,B); (F) the endometrial gland and vessels are similar to (A,B); (G) leukocytes in the stroma are numerous, with lesser endometrial glands than in the control group (C,D); (H) few endometrial glands and pseudo-stratified epithelium. These findings are different from (C,D). Bars in (A,C,E,G) and in (B,D,F,H), are 40 µm and 5 µm, respectively.