Human cloning. Conceptual computer artwork of cloned foetuses developing in artificial wombs. The red and blue tubes (upper right) represent the supply of oxygenated blood and the removal of deoxygenated blood respectively. The foetuses are connected to the central supply by their umbilical cords. During cloning, genetic material (deoxyribonucleic acid, DNA) from an organism is implanted into an egg (female reproductive cell) which has had its DNA removed. Triggering the growth and development of the egg will produce a clone, a genetically- identical duplicate of the original organism.