The need for genetic counselling derives from the peculiarities of genetic information, as compared to other biomedical tests, with particular reference to (a) its predictive character; (b) the existing gap between the ability to diagnose and to treat an inherited disorder, and (c) the psychological, social and ethical problems that genetic testing can raise. Counselling is traditionally performed by healthcare professionals, specifically trained to help individuals to develop ways of dealing with genetic information and gain a better understanding of the problems related with it. The growing number of genetic tests (for rare Mendelian as well as for common disorders), the development of easier and cheaper molecular techniques, the increasing tendency of physicians to have recourse to genetic tests, by-passing alternative diagnostic procedures, are all factors that contribute to the vast increase in the demand for genetic tests, a demand which is significantly out of step with the available numbers of trained counsellors. This paper discusses possible solutions, including the institution of committees with regulatory powers on genetic testing, the promotion of studies on models of genetic services, on programmes to monitor the services currently offered by test providers, and the expansion of training programmes and of employment opportunities for genetic counsellors.