The "new genetics" will provide new genetic tests that can be used for diagnosis, prognosis, treatment selection, carrier and predictive testing in affected families, and potentially for susceptibility testing for later-onset multifactorial disease and population screening. Doctors will increasingly need to consider the family implications of a genetic diagnosis - to identify family members at risk of the disorder or of having affected children and to consider how these individuals might be advised of their situation. Clinical geneticists can be a valuable resource for doctors who need advice about whether genetic testing is available, which tests to pursue, how to access testing services, and how to interpret and act on test results. Clinical geneticists also provide genetic counselling, a process which gives people understandable information about the genetic disorder in the family, and makes the information useful for decision-making given the person's unique circumstances and beliefs. The Internet will increasingly be a key source of information about genetic disorders for patients, their families and healthcare professionals.
