Imagine giving birth to your own great-uncle!
My personal favorite is the idea that we could "create" some 80 or 90 genetically superior embryos, freeze them, and then shoot them into space, in the hope that they might be found, adrift, centuries later by an advanced star ship.
Regards,
Well not embryos but Star Trek did that in “Space Seed”.
I believe that was generally the plot to "Species". It didn't work out great.