Epoophoron is a term used to describe an ovarian remnant that is present in female mammals. This structure releases hormones that regulate the menstrual cycle and plays a role in reproductive function. Synonyms for epoophoron include parovarium, epoöphoron, and organ of Rosenmüller. The parovarium is a small group of tubules located next to the ovary that produce a fluid that assists in egg transport. Epoöphoron is a similar structure located near the parovarium that produces estrogen and progesterone hormones. Lastly, the organ of Rosenmüller is another term for the parovarium that is named after a 17th century German anatomist. Regardless of the term used, the epoophoron and its synonyms play a crucial role in female reproductive health.