Thanks to continuous advances in human stem cell research, studies that make use of embryo models are progressing quickly. This research offers both a scientific and ethical alternative to the use of embryos resulting from fertilized human eggs, and the appropriate ethical guidelines have been developed in parallel with the advances being made. A group of biologists and ethicists suggest additions to the current ethical framework that refine thinking about human embryology using embryo models to maximize benefits to society.
Thanks to continuous advances in human stem cell research, studies that make use of embryo models are progressing quickly. This research offers both a scientific and ethical alternative to the use of embryos resulting from fertilized human eggs, and the appropriate ethical guidelines have been developed in parallel with the advances being made.
These new propositions build on the latest formal guidelines from the International Society for Stem Cell Research , which were issued in 2021 and dealt with emerging advances in the field, including stem cell-based embryo models, human embryo research, chimeras, organoids, and genome editing. Discussions about updated guidelines started after mouse embryo models were formed, in anticipation of major advances in human counterparts.
The authors propose this definition to be"a group of human cells supported by elements fulfilling extra-embryonic and uterine functions that, combined, have the potential to form a fetus." They note that current models do not meet legal definitions, but that it's important to define how to evaluate whether they have passed that tipping point in the future.
In addition, the authors also reiterate that, according to the ISSCR's Fundamental Principles, it is the duty of scientists to ensure accurate public understanding and perception of human embryology using embryo models.
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