Photo: Stem Cells Can Be Collected Without Destroying Embryos, Scientists Show

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A series of four images shows researchers removing a single cell from an embryo. The procedure involves using a tiny pipette to penetrate the embryo and extract a stem cell. The process does not destroy the embryo.

The technique is similar to one used during in vitro fertilization to test a human embryo for genetic abnormalities before it is implanted in a woman's womb.

Images courtesy Advanced Cell Technology/Nature

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