Endometrioma

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated May 7, 2026

An ovarian cyst formed by endometriosis, filled with old menstrual blood (colloquially called a "chocolate cyst"). Endometriomas reduce ovarian reserve and impair oocyte quality. Surgical management with excisional cystectomy is generally preferred over drainage and ablation, though ovarian reserve impact of surgery must be considered.³⁸

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