The ovary (From Latin: ovarium, literally "egg" or "nut") is an ovum-producing reproductive organ, often found in pairs as part of the vertebrate female reproductive system. Ovaries in female individuals are analogous to testes in male individuals, in that they are both gonads and endocrine glands. Although ovaries occur in a wide variety of animals, both vertebrate and invertebrate, this article is primarily about ovaries in humans.