In The Field

Human eggs supply ‘ethical’ stem cells

Work with unfertilized eggs could provide a way around restrictions on embryo experiments.

Human embryonic stem-cell lines have been successfully produced without using fertilized eggs. The researchers responsible work in Italy, which has some of the most restrictive embryo-research laws in the world. They hope the work will be welcomed as an ethically acceptable source of stem cells, as it does not involve destroying a viable embryo.

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