Undoing Gender is a book written by Judith Butler. It was published in 2004 by Routledge. Undoing Gender examines gender, sex, psychoanalysis and the medical treatment of intersex people. Focusing on the case of David Reimer who was medically reassigned from male to female after a botched circumcision, Butler reexamines the theory of performativity that she originally explored in Gender Trouble. While many of Butler's books are intended for a highly academic audience, Undoing Gender reaches out to a much broader readership.