Hermaphroditic

Some sci-fi writers play on hermaphroditic societies. Characters may be hermaphroditic, have more than two genders, or interchange gender according to the seasons.

Castle observed and studied the phenomenon of self-sterility in an Ascidian, Ciona intestinalis, which is hermaphroditic.

Slugs, like snails, are hermaphroditic mollusks, who thus have both ovaries and testes.