Scientists grow humanized kidneys in pig embryos
The feat is a step closer to growing organs for transplant
![An image of a pig embryo seen from the side with a large patch of red visible in its stomach.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/09/090623_ah_growing-human-kidneys_feat.jpg?fit=1030%2C580&ssl=1)
Scientists introduced human stem cells into pig embryos (one shown) engineered to lack a kidney. The stem cells then differentiated and grew into a new organ made mostly from human cells.
J. Wang et al/Cell Stem Cell 2023