(The Atlantic) – Thanks to more sophisticated genetic-testing techniques, IVF—an expensive, invasive treatment originally developed to help people with fertility troubles—is becoming a tool for optimizing health. A handful of companies offer screening for diseases and disorders that range from life-threatening (cancer) to life-altering (celiac disease). In many cases, these conditions’ genetic links are poorly understood or weak, just one factor of many that determine whether a person develops a particular condition. But bringing another human being into the universe can be a terrifying-enough prospect that some parents are turning to extensive genetic testing to help pick their future offspring. (Read More)