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In a 1st, scientists grow human kidneys inside developing pig embryos


Further development is needed, but this technology could one day be used to help relieve shortages in human organs needed for transplantation. (Image credit: J. Wang et al/Cell Stem Cell 2023.)

Scientists have successfully grown a human organ inside another animal for the first time. 

In a new study, published Thursday (Sept. 7) in the journal Cell Stem Cell, researchers inserted human stem cells into genetically tweaked pig embryos. When these were implanted into surrogate pig mothers, the embryos developed early-stage human kidneys within about 28 days. 

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