Scientists have developed human embryo-like structures without using sperm, an egg or fertilization, offering hope for research on miscarriage and birth defects but also raising fresh ethical concerns.
Earlier this year, several labs around the world released pre-print studies that had not been peer-reviewed, describing their development of early human embryo-like structures.human embryonic stem cellsThe research was welcomed by some scientists as an"impressive" advance that could help unlock secrets about the precarious early stages of pregnancies, when failure is most common.
The researchers, led by Palestinian scientist Jacob Hanna at the Weizmann Institute in Israel, harnessed the power ofThey produced embryo models up to 14 days old, which is the legal limit for human embryo lab research in many countries, and the point at which organs like the brain begin to develop. The research"is a step towards opening a window on the period of human development where many pregnancies fail and which has been really difficult to study up until now."
on generating the models was also low, with the stem cells organizing correctly just a small percentage of the time.
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