23andMe and similar services, though creepy to a degree to have your genetic information linked and profiled, have spawned a minor industry of social and familial alignment. Half-siblings and half-aunts/uncles are being found to be more common than people realized. The convergence of technology and society is fascinating. This was an interested read on the mispractice of a fertility doctor.
My intuition is that infidelity and paternity fraud is wildly more common than anyone wants to believe, and old social orders will break down as it becomes impossible to ignore and trivial for even light suspicions to be validated.
I have to believe it's good in the long run, because I think any order built on the foundation of deception is inherently fragile and ultimately doomed. There's a stronger order on the other side, but potential chaos through the transition.