Jürgen Habermas has argued against prenatal genetic interventions used to influence traits on the grounds that only biogenetic contingency in the conception of children preserves the conditions that make the presumption of moral equality possible. This argument fails for a number of reasons. The contingency that Habermas points to as the condition of moral equality is an artifact of evolutionary contingency and not inviolable in itself. Moreover, as a precedent for genetic interventions, parents and society already affect children's traits, which (...) is to say there is moral precedent for influencing the traits of descendants. A veil-of-ignorance methodology can also be used to justify prenatal interventions through its method of advance consent and its preservation of the contingency of human identities in a moral sense. In any case, the selection of children's traits does not undermine the prospects of authoring a life since their future remains just as contingent morally as if no trait had been selected. Ironically, the prospect of preserving human beings as they are – to counteract genetic drift – might even require interventions to preserve the ability to author a life in a moral sense. In light of these analyses, Habermas' concerns about prenatal genetic interventions cannot succeed as objections to their practice as a matter of principle; the merits of these interventions must be evaluated individually. (shrink)

This article explores the possibility that there is a parental duty to use preimplantation genetic diagnosis (PGD) for the medical benefit of future children. Using one genetic disorder as a paradigmatic example, we find that such a duty can be supported in some situations on both ethical and legal grounds. Our analysis shows that an ethical case in favor of this position can be made when potential parents are aware that a possible future child is at substantial risk of inheriting (...) a serious genetic condition. We further argue that a legal case for a duty to use PGD for medical benefit can be made in situations in which potential parents have chosen to conceive through in vitro fertilization and know that any children conceived are at substantial risk of having a serious genetic condition. (shrink)