We already test for things like Downs Syndrome which doesn't mean that we stop pregnancy but it tells the parents what to expect. Since we can do gene therapy

We already test for things like Downs Syndrome which doesn't mean that we stop pregnancy but it tells the parents what to expect. Since we can do gene therapy to some degree already I imagine we'll fix things that are already known health problems for an individual. Eventually other things will become possible, including modifications that are not about health. That's where dragons be. We'll at least need rules about modifications that aren't 99% understood and "guaranteed" to do what is wanted. We will also want to ensure some level of genetic diversity - not allowing everyone to make their kids blue eyed.