Every few months, a story pops up about a new frontier in reproductive medical technologies: so-called “three-parent IVF.” NPR recently reported on efforts in Britain to allow embryos created via this technique to be transferred into women’s uteruses, while a New York Times Magazine cover article last summer focused on whether the Federal  Drug Administration would approve human clinical trials.

The three-parent IVF technique engenders controversy partly because all reproductive technologies…  [more]