Proclamation on biomedical science and reproductive medicine revised. The Vatican has said that researchers should not work with stem cells derived from embryos.Punchstock The Roman Catholic Church has reaffirmed its opposition to embryonic stem cell research in a document that updates its 20-year-old position on biomedical research and reproductive medicine. The instruction Dignitas Personae not only condemns embryonic stem cell research, and in vitro fertilization (IVF) but also formalizes its many previous positions including banning human cloning to produce embryonic stem cells, and human–animal cloned chimaeras. For Catholic researchers, the biggest impact of the new text is that for the...