human embryos

Risks rise as ISSCR drops strict 14-day rule on human embryo growth in the lab

mouse embryos grown outside the lab

Something called the 14-day rule on growing human embryos in the lab helped keep a tough question in check for a long time: when is it ethically wrong or just practically unwise to continue growing a human embryo for research? There is no good answer based on science or anything else. ISSCR moves beyond strict …

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Monkey human embryo chimera Cell paper: exciting, ethically complex direction

human embryo chimera

A new Cell paper from an international team led by Juan Carlos Izpisua Belmonte pushes human embryo chimera embryo research further than ever before. It is both exciting work and raises many complex bioethics questions at the same time. What is a human embryo chimera? By way of background, chimeric human embryos contain a mixture …

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