Physicians are obligated in many jurisdictions to perform life-sustaining treatments on premature infants with serious developmental or physical impairments, even if it goes against the parents' wishes.
Although the U.S. Supreme Court has decided that physician-assisted suicide is a matter of states' rights, there are many ethical and legal issues still unresolved for physicians.
Medical professionals can take a more thorough patient medical history with the assistance of pedigree software and other tools designed to assess genetic risk.