A team of doctors have created a human embryo with three biological parents. They planted the nucleus of an embryo (formed in the usual way with egg and sperm) into another egg whose nucleus had been removed. The embryo began to grow as normal.
This of course leads to the disturbing question: do we want to create people with three genetic parents? What are we doing to our children? And does anyone even care about the impact on children, since the overriding concern in all these technologies seems to focus on the desires and "needs" of the adults?
A rather disquieting tangent along these lines is the door that such an experiment opens to polygamy. If children have three "natural" parents, then why can't these parents all get married and live in the home, and share in the raising of their child? Any other arrangement is arguably unfair to the child, who is forced to choose between parents and see less of one than the two others.
It is also interesting that for this experiment, the scientists used the "defective" embryos left over from IVF. And with this little "transplant," the embryos got a second wind and started developing as normal. Thus, there may now be a way to "save" some of those embryos that were previously written off as too damaged to use in IVF.