Embryo selection claims outpace evidence, raising ethical, medical, societal risks Prospective parents are increasingly being marketed genetic tests that claim to predict which IVF embryo will grow into the tallest, smartest or healthiest child. These tests promise parents an unprecedented level of control over their future child’s traits and disease risks, presenting embryo selection as a pathway to a “better” baby. However, these claims far exceed what science can reliably deliver at present.