Fertility clinics in the UK will soon begin pre-screening embryos before implantation for genes that predispose to breast or colon cancer as an adult. (I guess if you are going to cull out the unfit, this is as good a time to do it as any(?).)
“Leather said the decision deals with serious genetic conditions for which there is a single test. The HFEA would not consider genetic screening for mild conditions like asthma or eczema or schizophrenia where a number of genes have been identified.”
Tim Converse 