It looks like three-parent babies will be the test-tube babies of this decade.
The process uses the DNA from a man and a woman plus the mitochondrial DNA from a second woman, and is intended to allow women with mitochondrial diseases to bear their own biological children without passing on the disease.
But from a polyamorous point of view, this is really an awesome way to fuck with the legal system.
"Yes, yes, but which of you are the biological parents?"
"We all are, your honor."