[The place of prenatal diagnosis in genetic counseling (1982-1983)]

34.2% of couples seen during the years 1982 and 1983 for genetic counselling had some kind of familial anamnesis such as affected partner or relative or children. They could have benefit from prenatal diagnosis who would have been accurate informative twice on three times. Indications methods and accuracy are studied in consideration to the reason of referring and the level of the risk. Genetic counselling and prenatal diagnosis appear as preventive means adapted to each consultant. Otherwise systematic ultrasonography allows a true prevention from which 17.6% of the couples having give birth to affected children could have benefit.