منابع مشابه
Embryo experiments.
A fellow of Cambridge University explores the implications of the British Department of Health's 1987 white paper on "Human Fertilisation and Embryology: A Framework for Legislation." The paper proposes the creation of a statutory authority to license experiments on human embryos in vitro during the first 14 days after fertilization, after which any surviving embryos would have to be destroyed...
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It is characteristic of the early development of the vertebrate animals that the embryo should be formed largely as a result of successive displacements of the cell population created during and after cleavage. Of these the first bring the endoderm and the mesoderm into what are effectively their definitive positions by paths that vary somewhat from one vertebrate to another. They are followed ...
متن کاملCentenary of his embryo transfer experiments
About 100 years ago, on 27 April 1890, Walter Heape transferred rabbit embryos from one mother to another. One animal became pregnant and delivered young from the transferred embryos. Thus the first mammalian embryo transfer experiment was successfully completed. In this paper, I describe these experiments in some detail and then analyse why they were done. I place this embryo transfer work in ...
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Assault on the Liberal Trading Order
G the hotly contested U.S. presidential election and the surprising victory of Donald Trump, followed by the flurry of executive actions, it is easy to lose sight of the broader challenges to the U.S.-promoted post-Second World War economic order. My analysis proceeds in four parts. First, I consider how we have moved away from multilateral to bilateral trade negotiations. Second, I consider ho...
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ژورنال
عنوان ژورنال: Nature
سال: 1988
ISSN: 0028-0836,1476-4687
DOI: 10.1038/334640c0