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Nature 444, 432-435 (23 November 2006) | doi:10.1038/444432a

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Medicine: Blastomeres and stem cells

Joe Leigh Simpson1

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Generating human stem cells from a single cell recovered during preimplantation genetic diagnosis does not, in principle, harm the embryo. Can the approach be used in assisted reproductive technology programmes?

Elsewhere in this issue, Klimanskaya et al.1 report an exciting advance for the field of human embryonic stem (hES) cell biology. Readers may have a sense of déjà vu, however, for this paper first appeared as an online publication2 on 23 August.

  1. Joe Leigh Simpson is in the Departments of Obstetrics and Gynecology, and Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, USA.
    Email: jsimpson@bcm.tmc.edu

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