The ASEBIR stands for the Association for the study of the biology of reproduction, has managed what for a long time it has been investigating, it was the reproduction of embryonic stem cells, this can open many doors for the solution of diseases that today have no cure, for example Alzheimer's or Parkinson's, and many others. Using these techniques it can repair damaged neural tissues and this technique is very similar to that in its day was applied to Dolly the sheep. This discovery may have two readings a the possibility of cloning human beings, or the regeneration of tissues in the same, the controversy is in the street. The authors of the scientific work make very clear that their objective is the regeneration of the tissues damaged in humans, to remove any doubt about his future projects.