Can we really make sperm in a dish? After claiming earlier this year that they had done just that, French researchers have now taken out a patent describing their technique, although they are yet to submit details of their method and its results for peer review.
Philippe Durand and Marie-Hélène Perrard at the biotechnology company Kallistem in Lyon, France, say that their method coaxes seminiferous tubules – tissue that produces sperm in the testes – taken from humans, rats or monkeys into producing mature sperm cells.
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