Posted on the journal "Nature Comunnications", it is the technique developed by a research team led by Swedish Karolinska Institute which consists in taking a single cell from an embyo, composed of only eight cells, without compromising its growth, and make it multiply in a consistent way, in short time.

It's, therefore, a methode which will open the limitations imposed on the ethical usage of embryo cells, even thought the overcoming of these problens had been resolved with the introduction of iPS production ( Induced Pluripotent Stem) created in a test tube.