I can also see this as an important step in developing gene repair technology, in which the embryo could be preserved but the genetic defects could be corrected in time so that the child would be born healthy. That may be coming too.
Years ago I had a friend who had her tubes tied because she had Type I diabetes, which is genetically transmitted, and didn't want to pass that on. With this technology she could have perhaps had her own children.
In time I would think most body parts could become easily replaceable except for the brain which we apparently have very little knowledge about still. I always liked the idea of the movie the 6th day where they copy your memory and then past it into a clone of yourself.