Nature And Nature Cell Biology

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.

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.