Slide DMS175 [Ovary, corpus luteum, human, H&E]. This slide is useful for showing the size and appearance of a recently formed corpus luteum ("corpus hemorrhagicum") occupying the center of the section. Note the predominance of the granulosa lutein. The theca lutein cells are easily distinguished in this section as well…they are the more darkly-stained cell population immediately outside of the granulosa lutein cells; they also penetrate their way into the corpus luteum with the perivascular connective tissue.

Try to identify other types of follicles in the cortex. Also try to differentiate the cortex from the medulla and examne the surface of the ovary (cuboidal epithelium with a "tunica albuginea."

Section of a mature ovary: 1. Blood vessels; 2. Atretic follicle; 3. Mature follicle; 4. Corpus albicans; 5. Stroma; 6. Growing follicle; 7. Cuboidal epithelium; 8. Tunica albuginea; 9. Antrum of secondary follicle; 10. Corpus luteum; 11. Primordial follicles; 12. Stroma; 13. Corpus albicans