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How stem cell science may change how we reproduce

It may soon be possible to coax human skin cells into becoming functional eggs and sperm using a technique known as “in vitro gametogenesis”. This involves the creation (genesis) of eggs and sperm (gametes) outside the human body (in vitro). In theory, a skin cell from a man could be turned into an egg and a skin cell from a woman can become a sperm. Then there’s the possibility of a child having multiple genetically-related parents, or only one.