self-fertilization: fertilization by the union of male and female gametes from the same individual
fertilization: creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant
reincarnation: the Hindu or Buddhist doctrine that a person may be reborn successively into one of five classes of living beings (god or human or animal or hungry ghost or denizen of Hell) depending on the person's own actions