After the commercialisation of induced pluripotent stem cells (IPSCs) in 2007, the pressure to commercialise women's eggs for stem cell research could have been expected to lessen. However, the pressure to harvest human eggs in large quantities for research has not diminished; rather, it has taken different directions, for example, in germline mitochondrial research. Yet there has been little acknowledgement of these technologies' need for human eggs, the possible risks to women and the ethical issues concerning potential exploitation. Rather, there (...) has been a renewed campaign to legalise payment for eggs in research, although the actual scientific advances are at best modest. This article shows why a market in women's eggs is ethically problematic in terms of the doctor's duty to do no harm and the limitations of informed consent. (shrink)