Many technics showed that adult stem cells could effectively substitute embryonic cells in cellular therapy. One medical and ethical problem to resolve is to find adequate substitute for the use of embryonic stem cells in regenerative and reparatory medicine. The best possibility could be to use adult stem cells. Among these are stem cells from amniotic fluid. An article has now been published in the American Journal of Obstetrics and Gynecology (214; 321-327, 2016), which reviews the usefulness of amniotic fluid stem cells, highlighting that there are no ethical difficulties in using them, and that clinically they can be applied in foetal therapy, degenerative diseases and in regenerative and reparatory medicine in general.