There is great interest worldwide in discovering and developing a permanent source of tissues which would be capable of generating any cell type and which would avoid the problem of transplant rejection. Stem cells are cells that can specialize into the many different cells found in the human body. The ethical objections concerning stem cells have focused primarily on their source. Human embry...

effect of cervical mucus aspiration with insulin syringe on pregnancy rate in art cycles     a. aflatoonian md1*, m. asgharnia md 2, n.tabibnejad gp3     1- associated professor, dept. of gynecology, university of medical sciences and research and clinical center of infertility, yazd, iran   2- assistant professor, dept. of gynecology, guilan university of medical sciences, rasht, iran   3- gen...

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In many jurisdictions, restrictions prohibit the culture of human embryos beyond 14 days of development. However, recent reports describing the successful maintenance of embryos in vitro to this stage have prompted many in the field to question whether the rule is still appropriate. This Spotlight article looks at the original rationale behind the 14-day rule and its relevance today in light of...

This paper interprets the British legislative process that initiated the first comprehensive national regulation of embryo research and fertility services and examines subsequent efforts to restrain the assisted reproduction industry. After describing and evaluating British regulatory measures, I consider successive failures to control the assisted reproduction industry in the US. I discuss dis...

search for a new international treaty than the Bush administration. Pachauri said there was still time for the developed countries to convince India and China to sign a new deal next year, but that it would require a series of " measures and actions " in the next few months. He urged other rich countries to follow Europe's lead and set ambitious carbon reduction targets for the next ten years. ...

objective: after the introduction of assisted reproductive techniques, human embryos were officially introduced into laboratories and now thousands of them are cryopreserved in such settings. embryonic stem cells and the future application of such cells in the treatment of disease opened the door to further research on human embryos. these developments raise many ethical issues, some of which h...

Frederick W. Alt Don L. Anderson Michael Ashburner Stephen J. Benkovic David E. Bloom Floyd E. Bloom Piet Borst Henry R. Bourne Michael S. Brown James J. Bull Kathryn Calame C. Thomas Caskey Dennis W. Choi John M. Coffin Paul J. Crutzen James E. Dahlberg Robert Desimone Bruce F. Eldridge Paul T. Englund Richard G. Fairbanks Douglas T. Fearon Harry A. Fozzard Klaus Friedrich Theodore H. Geballe ...