Embryos In Lab

Mr He has resumed research on human embryo genome editing, despite the controversy over the ethics of artificially rewriting genes.

The news hit Niki Schaefer hard. About 2,000 frozen embryos and eggs may have been destroyed by a lab malfunction at the University Hospitals Fertility Center in Cleveland.

When scientists grow human embryos for lab research, they end their experiments at the 14-day mark. Until now, these internationally accepted guidelines (and the laws formed around them) have been largely self-regulating: The record for in-vitro gestation was just nine days, and most labs struggled to keep embryos alive longer then a week.

Scientists have for the first time grown human embryos outside of the mother for almost two full weeks into development, giving unique insight into what they say is the most mysterious stage of early human life.

Mr He has resumed research on human embryo genome editing, despite the controversy over the ethics of artificially rewriting genes.

The news hit Niki Schaefer hard. About 2,000 frozen embryos and eggs may have been destroyed by a lab malfunction at the University Hospitals Fertility Center in Cleveland.

When scientists grow human embryos for lab research, they end their experiments at the 14-day mark. Until now, these internationally accepted guidelines (and the laws formed around them) have been largely self-regulating: The record for in-vitro gestation was just nine days, and most labs struggled to keep embryos alive longer then a week.

Scientists have for the first time grown human embryos outside of the mother for almost two full weeks into development, giving unique insight into what they say is the most mysterious stage of early human life.