Excellent article outlining the issues we are soon to face or facing already. To me, these questions are more difficult to deal with that evolution from a theological viewpoint, as they impact who we are as humans. Evolution merely addresses the mechanism by which we came to be.
We now have clinics advertising stem cell therapy for various conditions, using auto genius mesenchymal stem cells and having good success at harvesting dollars (though very doubtful success in actual beneficial treatment). It is not that much of a stretch to see fetal tissues grown for harvest for implants in the near future. Only problem may be the lag time: it might be tough to grow a new heart if you need one next week!
So where do we draw the line ethically? Good question. I don’t see the Bible answering questions like these directly as it was written at such a time that only the basics of reproduction were known, and with some misconceptions of those. Hopefully, we can learn Biblical wisdom to apply to a changing world.