Terminology and motifs such as mpreg (male pregnancy), hurt/comfort (stories in which one or both characters suffer severe trauma and the healing process creates ties between them), or domestic discipline (stories which establish a dominant/submissive pairing with disciplinary encounters) have evolved in conversation with wider cultural genre discourses but have developed their own histories and meanings within fandom. Male pregnancy, time travel, and animal transfiguration all have precedents in science fiction literature, but they have also developed as specific generic discourses within fandom, with clearly recognizable subtropes and characteristics.
Louisa Stein and Kristina Busse, Limit Play: Fan Authorship between Source Text, Intertext, and Context














