If you're talking about DNA, yes, but no. I've worked on that too and it's much harder. In the above instance we used photos of the donors and customers and the typical case was to get a close match for the partner who was shooting blanks in order to produce an offspring who ideally would look like both "parents".

That is really awesome, would you happen to know how effective the photo method is? As in, do the kids end up looking similar to their “parents”?

I couldn't imagine an ML project where you have to wait 10-15 years before finding out if the results were good enough!

It’s old knowledge that parents (more typically fathers) bond with newborns that look like them, so you could have results within a year and again within 5 when the child looks more like their adult selves