It doesn't really harm the embryo to get a probe into mommy and collect some skin cells. But it could be problematic that a probe is put into mommy.
So people do pre natal diagnoses which is okay in my book, especially when you are 40 years old and considering the fact that a full gene sequencing is somewhere below 600€ today. It's not even an elite-thingy.
Also I like the thought that you can dodge abortion that way for the case that a seriousness health problem you couldn't handle would be detected. I think it's good to make 100% sure that this little thing will not suffer and is not concious when it goes into the bin (it's below <18 cells AFAIK).
t. Not an expert working in a very remotely related field knowing people doing such diagnostics