Sperm was a biological substance involved in the reproduction of certain species, during which it was often paired with ova. In several species, sperm was produced by males and inserted into females. For instance, male sarlaccs attached to females as parasites and fed their sperm into their mates. Females of the ghest species of the planet Rodia could even access the sperm of a dead male and self-inseminate, leading to the laying of fertilized eggs. Among the gra species, genetic engineering by sentient beings was so extensive that gra sperm and ova were sold with instruction manuals.
In other species, the same individual produced both sperm and eggs. For instance, the silicon-based shadow barnacle of the planet Coruscant released both egg seeds and sperm pollen into the atmosphere to reproduce.
- Dark Forces: Jedi Knight (First mentioned)