[Acquiring a sexual identity].

Progressive acquisition from childhood onwards to adulthood of a procreative and psycho-emotional sexual identity is presented in all its bio-psycho-social complexity. Gender identity disorders (GDI) and the different sexual orientations (hetero-, homo- or bisexual) are included with their possible etiologies. Different medico-psycho-social programs and projects are presented targeting persons having difficulties in this developmental process of their identity.