Nature.com July 10, 2026 • 19:42

Lab-grown sperm: scientists inch closer to fertility breakthrough - Nature

Sci-fi procedure creates immature human sperm from stem cells, nurturing them on a mouse’s kidney.

Researchers are trying to make human sperm (shown here in a colourized electron microscope image) from stem cells in the lab.Credit: Juergen Berger/Science Photo Library
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Lab-grown sperm: scientists inch closer to fertility breakthrough - Nature

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