London: Japanese scientists have accomplished a feat thought to be impossible — for the first time, they have produced fertile mammalian sperm in a test tube.The technique holds significant promise for male infertility, reports Nature.
To track sperm development, they used a fluorescent protein that marked cells undergoing — or that had undergone — meiosis.After several weeks in the mix, the testes looked normal and were producing sperm. Nearly half of the samples contained cells with sperm-like tails.Finally, the researchers injected the sperm into egg cells. A few weeks later, surrogates delivered a dozen live, fertile offspring. ANI
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