My Father did most of 20 years active duty with the WRONG blood type stamped on his dog tags.

That said, the placenta that followed my child out of his mothers womb had a bunch of testing done and products harvested from it, including stem cells. Id bet they could duplicate the kid with it, if they tried. The doctor made it sound so important, I asked what it was worth to him.
He didnt offer anything.

Best,
Ted