The very first designer baby was Adam Nash. Born in the 2000s, Nash was ‘designed’ in a petri dish in a lab to save his sister. His sister was born with Fanconi anemia, a rare and dangerous genetic disease that required a donor for her stem cell therapy. The solution devised by the parents and doctors was to conceive Nash so that the umbilical cord blood containing stem cells could be utilized to treat his sister. During his in vitro conception, Adam was screened to make sure he didn’t have the disease and could serve as a donor. The plan worked, and Adam saved his sister, becoming the world’s first designer baby in the process. But what exactly are designer babies?