If fertilization does not occur, the corpus luteum degenerates into which structure?

• A. Corpus Albicans
• B. Corpus Callosum
• C. Corpus Cavernosum
• D. Corpus Allatum

Answer: (A)

When fertilization does not occur, the corpus luteum stops producing progesterone and regresses through luteolysis. The tissue is replaced by fibrous connective tissue, forming a corpus albicans—a pale, scar-like structure on the ovary. Over time this corpus albicans is resorbed, and hormonal support for the endometrium wanes, leading to menstruation in a nonpregnant cycle. The term you’re looking for is corpus albicans because it specifically describes the luteal tissue that has involuted into scar tissue after its role is complete. The other terms refer to structures in other parts of the body and aren’t involved in ovarian luteal regression.