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Volume 353:1645-1649 October 20, 2005 Number 16 Next

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U.S. scientists studying human embryonic stem cells face unprecedented political, regulatory, and financial barriers created by the Bush administration's restrictive policies and by the ongoing national debate over the ethics of such research. The most promising method of making patient-specific and disease-specific embryonic stem-cell lines — somatic-cell nuclear transfer — is also the most ethically troubling for many people, because it requires both the creation of embryos for research purposes and the recruitment of women as egg donors. The procedure, in which the nucleus of a somatic cell is inserted into an oocyte, providing the genes for the development of . . . [Full Text of this Article]

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