Mitochondrial Replacement Techniques, the Non-Identity Problem, and Genetic Parenthood.

Mitochondrial replacement techniques (MRTs) are designed to allow couples to have children without passing on mitochondrial diseases. Recently, Giulia Cavaliere and César Palacios-González argued that prospective parents have the right to use MRTs to pursue genetic relatedness, such that some same-sex couples and/or polygamous triads could use the process to impart genetic relatedness between a child and more of its caregivers. Although MRTs carry medical risks, Cavaliere and Palacios-González contend that because MRTs are identity-affecting, they do not cause harm to an existing human being, and our intuitions otherwise arise from the non-identity problem. Here, I review several attempts to address the non-identity problem, and propose a solution to the problem. Furthermore, I argue that regardless of one's stance on whether MRTs are identity-affecting, the use of MRTs to pursue genetic relatedness alone falls outside the scope of the medical profession, as they involve substantive medical risk for no medical benefit.