 From scientific problematizations to political problems: The role of expert knowledge in Québec’s recognition of trans identities 
Between 2013 and 2016, laws on legal sex change in Québec were transformed, forsaking the traditional medical model of transsexuality and espousing the new trans-affirmative models on gender variance. During this time, transphobia was also effectively problematized, resulting in the prohibition on discrimination based on gender identity or expression. Based on a genealogical analysis of scientific discourses about trans identity, this article aims to illustrate the role of experts adopting the perspective of « allies » in this transformation of public action, and show how a posture of recognition of trans people’s suffering and aspirations and their integration into scientific discourse in moments of problematization were central elements in such transformation.