Deciding the fate of disputed embryos: Ethical issues in the case of Natallie Evans

A number of disputes have arisen in recent years over the status of non-transferred embryos cryopreserved during in vitro fertilisation. One such case is that of Natallie Evans who in April 2007 lost her final attempt to prevent the destruction of embryos created with the sperm of her former partner. Ms Evans had been rendered infertile by cancer treatment, and the embryos represented her only chance of having genetically related children