Making babies 'cancer-free'?

The first baby born in the UK to have been screened as an embryo for a cancer gene is raising again a hornets nest of ethical issues. There is more to discuss with this than can be handled in less than a book, so I won't even attempt it here. It is worth pointing out, though, how even more complicated this issue is than the over-wrought debates about abortion. On top of the question of whether an embryo or fetus has moral status, the issue of designer babies involves serious questions about what duties mothers have to their children, and whether embryonic screening is impermissibly discriminatory or even a form of eugenics. Moreover, there is the considerable cost of genetic screening and in vitro fertilization. As a result, those families who are least able financially to cope with having a child genetically predisposed to disease would be the ones least able to do anything about it. Suffice it to say that bioethicists are going to be busy with this for quite a while. 

Comments welcome.