Lab-grown Human Embryo Models Spark Calls for Regulation
Experts say this must be treated with caution
Scientists have used stem cells to create structures that resemble human embryos in the lab, in a first that has prompted calls for stricter regulation in the rapidly advancing field.
Several different labs around the world have released pre-print studies in the past seven days describing their research, which experts said should be treated with caution as the research has not yet been peer-reviewed.
The labs used different techniques to encourage human embryonic stem cells, which can become any type of cell, to self-assemble into a structure that resembles an embryo -- without needing sperm, an egg or fertilization.
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