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In Breakthrough, Scientists Edit a Dangerous Mutation From Genes in Human Embryos

Researchers have found a way to reliably remove disease-causing mutations from human embryos, an achievement sure to renew concerns over so-called designer babies.

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A New Form of Stem-Cell Engineering Raises Ethical Questions

“Sheefs” will test the limits of current regulations, experts say, as embryolike structures are created directly from stem cells.

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Artificial Wombs Just Got One Step Closer to Reality

Scientists have sustained human embryos in a petri dish for 13 days, shattering the previous record of nine days. The breakthrough will allow researchers to study early fetal development in unprecedented detail, and brings us one step closer to viable “artificial wombs.” But it’s adding fuel to an already heated ethical debate.