This article aims to examine whether there is continuity between eugenics as employed in Nazi Germany and modern-day medical genetics. Drawing on Foucault’s conceptualization of the relationship between power and knowledge, it draws the conclusion that despite the differences in the means employed and underlying motivations, both may serve as disciplinary tools and shape human behaviour. Finally, it addresses ethical issues that arise during genetic reproduction counselling. Namely, it reviews how genetic information during genetic reproduction counselling is presented to those being counselled and puts forward the idea on how to stay committed to the principle of non-directiveness.