Children created through mitochondrial replacement techniques (MRTs) are commonly presented as possessing 50% of their mother’s nuclear DNA, 50% of their father’s nuclear DNA and the mitochondrial DNA of an egg donor. This lab-engineered genetic composition has prompted two questions: Do children who are the product of an MRT procedure have threegeneticparents? And, do MRT egg donors have parental responsibilities for the children created? In this paper, I address the second question and in doing so I also address the first (...) one. First, I present a brief account of mitochondrial diseases and MRTs. Second, I examine how MRTs affect the numerical identity of eggs and zygotes. Third, I investigate two genetic accounts of parenthood and MRT egg donation. Fourth, I explore three causal accounts of parenthood and MRT egg donation. My conclusion is that, under the appropriate circumstances, MRT egg donors are parentally responsible for the children created under genetic accounts of parenthood and under causal accounts of parenthood. (shrink)

United States law recognizes adult reproductive liberty and many states view surrogacy services through that lens. During the COVID-19 pandemic in March, 2020, New York State enacted the Child–Pare...

In her recent paper, Emanuele Mangione proposes combining maternal spindle transfer (MST) and reciprocal effortless in vitro fertilisation (ReIVF) to enable both females to have genetic and gestational ties with the same child, which can particularly benefit lesbian couples. This response rejects Mangione’s proposal for the reason that the additional biological ties created by MST+ReIVF, compared with the reception of oocytes from partner (ROPA), are unnecessary. ROPA is currently the most effective method for redistributing biological ties within lesbian couples, allowing (...) one member to provide the egg and the other to carry the fetus. The additional biological ties created by MST+ReIVF are quantitatively too small to significantly enhance parental bonding or couple relationships, and their potential harms to both prospective parents and children outweigh any minor benefits. Furthermore, like ROPA, MST+ReIVF fails to address deeper feminist concerns. Therefore, I propose a new idea: combining in vitro gametogenesis with ectogenesis, which can offer far more reproductive choices and greater potential to address deeper feminist concerns than MST+ReIVF. (shrink)