Some nitpicks: * IVF involves retrieval and then fertilization of eggs. There’s not usually leftover unfertilized eggs unless the woman is banking her eggs. * The success rates my partner and I have been quoted mean that we want to keep as many embryos as possible in case we need to try again. I think it would be really unethical to ask a woman to give up any good eggs or euploid embryos as they can be hard to get in some cases.

The shots a woman has to give herself daily to stimulate follicle production are no joke. That would be a lot to put someone through purely for research. It’s not as simple as that. And it’s wishful thinking to expect any woman to do that.