You may have heard that Britain is on the path to legalizing the creation of three-parent embryos: using one woman's egg, another woman's mitochondrial DNA, and the father's sperm. To many, this seems like Frankenbaby territory, or the stuff of a sitcom. But to British physician Tom Solomon, the writer of the piece that follows, three-person IVF poses no ethical dilemma. In fact, because this new technique can actually prevent a mother with abnormal mitochondrial DNA from passing a fatal flaw on to her baby, Solomon asserts it would be unethical not to use it. What do you think? Should we implement this life-saving reproductive technology without a second thought, or does it represent a step onto eugenics' slippery slope? Sound off in the comments.