First PGD BRCA1 baby born in UK

As the BBC has reported here, the first baby has been born in the UK whose birth was a function of preimplantation genetic diagnosis (PGD) for–or, rather, against–a gene, some of whose alleles have mutations strongly correlated with certain forms of breast and ovarian cancer. What follows are the basics, and two viewpoints on this, and a poll for you to participate in.