Why wouldn't this be ethical. In my opinion this is ethical because we are helping someone by printing them a new organ so that they can live longer and happier lives. We simply just turn on a 3-D printer and it prints a new strip of cells or new strips of human organ tissue to build a new organ for the person in need.
yes replicating human organs is ethical. you don't have to rip out someone else's organ to replicating it, its just a matter of extracting some stem cells popping it in a machine and wazza, theirs your organ. no ones feels a extreme amount of pain and it benefits the subject for... well i though i was for , bye