Opposition to the use of stem cells - from embryos or adults - in research is nothing new. But the presentation to MEPs, on 10 April, of the European citizens’initiative (ECI) ’One of us’, which seeks to protect human life from the moment of conception and supports respect for the physical integrity of embryos, has retriggered debate on the use of these cells in research. The organisers of the initiative want a halt to EU funding of activities entailing the destruction…