Genetic counselling in cystic fibrosis. Results of a survey of 572 families.

In a survey by questionnaire of 572 families with one or more children affected with cystic fibrosis 72% were found to have received genetic counselling. The mode of inheritance was correctly known by only 45% and either not known or incorrectly known by the others. About 75% expressed the wish for more information on the genetics of cystic fibrosis. The data indicate that genetic counselling in cystic fibrosis is not given or is ineffective in a high proportion of families. It is suggested that genetic counselling, backed up by a written resumé should be a regular part of the management of families with this disease. The genetic data are consistent with autosomal recessive inheritance at a single locus.