In biology, a hermaphrodite was an organism that had reproductive organs normally associated with both male and female sexes.
Despite their female-sounding voices, Alpha Centaurans were hermaphrodites and properly referred to as "it". Nevertheless, the Third Doctor generally used the masculine to refer to the Federation ambassador to Peladon. (TV: The Curse of Peladon)
Circa 2360, it became popular among humans to become hermaphrodites. In 2363, the fad ended. Wanting to find a way to quickly populate colony planets, the Earth government conducted experiments in super-fertility with some of the hermaphrodites. (PROSE: Dead Romance)