The main aims of the studies described in this thesis were to monitor the transfer of information during genetic counseling and to investigate the adequacy of the existing strategies for supporting counselees in their decision-making process, and if necessary, to devise new strategies. This study is a continuation of a project at our Department investigating the psychosocial aspects of genetic technology. The first part of this project concerned the assessment of the psychosocial aspects of prenatal diagnosis (ThomassenBrepols et al., 1982; Thomassen-Brepols et al., 1983; Thomassen-Brepols, 1985). In the present study the psychosocial aspects of genetic technology as provided during genetic counseling are assessed in relation to the reproductive decision and its process. A comprehensive follow-up study was carried out in 164 couples 2-3 years after genetic counseling, focusing on the psychological aspects of the postcounseling decisionmaking process.