"Changing Sex" takes a bold new approach to the study of transsexualism in the twentieth century. By addressing the significance of medical technology to the phenomenon of transsexualism, Bernice L. Hausman transforms current conceptions of transsexuality as a disorder of gender identity by showing how developments in medical knowledge and technology make possible the emergence of new subjectivities. Hausman's inquiry into the development of endocrinology and plastic surgery shows how advances in medical knowledge were central to the establishment of the material and discursive conditions necessary to produce the demand for sex change--that is, to both "make" and "think" the transsexual. She also retraces the hidden history of the concept of gender, demonstrating that the semantic distinction between "natural" sex and "social" gender has its roots in the development of medical treatment practices for intersexuality--the condition of having physical characteristics of both sexes-- in...