Those forms of research where stem cells can be obtained without causing serious harm to the donor, including stem cells obtained from spontaneously miscarried fetuses, umbilical cord-derived stem cells, and other kinds of adult stem cells “are to be considered licit.” Induced pluripotent stem cells, derived by “turning the cellular clock backwards” for an adult somatic cell by genetic reprogramming would fit in this category as well. In fact, any such research which does not raise significant ethical problems, and most particularly adult stem cell research, “should be encouraged and supported,” in the words of the document.
Stem cell research which depends on the destruction of human embryos, on the other hand, is identified as morally unacceptable. It represents, in the final analysis, an inhuman and inhumane activity that progresses “through the suppression of human lives that are equal in dignity to the lives of other human individuals and to the lives of the researchers themselves.”