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Professional guidelines on genetic testing of children have recently shifted their focus from protecting the child's autonomous choice to professionals, together with parents, striving to work in the child's "best interest." This notion of "best interest" allows room for therapeutical as well as psychological and social considerations, and gives rise to the question how parents and professionals weigh up the child's best interest in practice. In this qualitative study, we followed six extended families involved in genetic testing for hypertrophic cardiomyopathy in the Netherlands for 3½ years. In total 57 members of these families were interviewed in depth; many of them more than once. Our empirical analysis shows that the best interest of a child is constructed via long-term processes in the broader context of family and kin. In this context, "best interests" are considered and reconsidered. We conclude that a child's best interest should not be framed as the result of an instantaneous agreement between parents and professionals. In dealing with genetic testing of children, parents as well as professionals reflect on and learn from the processes of generating new meanings of "best interest." To enable professionals to deal with the variety in family life, these learning processes should be documented closely.

Since the 1990s, many countries in Europe and the United States have enacted genetic non-discrimination legislation to prevent people from deferring genetic tests for fear that insurers or employers would discriminate against them based on that information. Although evidence for genetic discrimination exists, little is known about the origins and backgrounds of fears of discrimination and how it affects decisions for uptake of genetic testing. The aim of this article is to gain a better understanding of these fears and its possible impact on the uptake of testing by studying the case of hypertrophic cardiomyopathy (HCM). In a qualitative study, we followed six Dutch extended families involved in genetic testing for HCM for three-and-a-half years. Semi-structured interviews were conducted with 57 members of these families. Based on the narratives of the families, we suggest that fears of discrimination have to be situated in the broader social and life-course context of family and kin. We describe the processes in which families developed meaningful interpretations of genetic discrimination and how these interpretations affected family members' decisions to undergo genetic testing. Our findings show that fears of genetic discrimination do not so much stem from the opportunity of genetic testing but much more from earlier experiences of discrimination of diseased family members. These results help identify the possible limitations of genetic non-discrimination regulations and provide direction to clinicians supporting their clients as they confront issues of genetic testing and genetic discrimination.

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