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In , a Chinese team claimed to have made artificial mouse sperm wholly in vitro and used it to fertilise eggs, transferring them into female mice for gestation. But already it is revolutionising medicine and assisted reproductive technologies may eventually feel the benefits too. If gametes grown in vitro prove safe for reproduction, the possibilities are dramatic — but could also be disconcerting, and might go well beyond providing eggs and sperm for those who lack them. Facebook Twitter Pinterest. Order by newest oldest recommendations. The researchers used some of this sperm to fertilise mouse eggs, which developed into apparently healthy mouse pups. Whether all this can work for human cells is another matter.

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