Persson, I. and Savulescu, J.

Cambridge Quarterly of Healthcare Ethics (2010), 19:51-60 Cambridge University Press DOI: 10.1017/S0963180109990247

In several papers, John Harris has argued that if i) it is morally permissible to engage in reproduction, whether natural or artificial, despite knowledge that a large number of embryos will fail to implant and quickly die, then ii) it is morally permissible to produce embryos for other purposes that involve killing them, for instance, to harvest stem cells that may be used to save lives