14-day rule

Weekly reads: 14-day rule vs. 28-day rule, virtual cells & Turing test, Prasad politics

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human-embryo-modification

Remember the 14-day rule? This rule, which isn’t really a rule, has been a widely-adopted guideline to stop growing human embryos in the lab after two weeks. In 2021, the International Society for Stem Cell research or ISSCR, dropped the two week guideline. Without a clear replacement. Although I’m a long-standing member of ISSCR, to […]

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

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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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When does a human embryo model become the real thing & other tough questions for a new field

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human embryo model mukul tewary sm

A human embryo model is a laboratory-produced collection of living cells that has some key things in common with real human embryos. They are made from pluripotent stem cells, which include embryonic stem cells and induced pluripotent stem cells or iPS cells. This research is both exciting and ethically complicated, raising some difficult questions. Embryo

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