2006 — Louisa Ellen Stein, "'This Dratted Thing': Fannish Storytelling Through New Media", in Fan Fiction and Fan Communities in the Age of the Internet: New Essays (eds. Karen Hellekson & Kristina Busse), McFarland & Company (2006), →ISBN, page 253:
The role of genre is evident; in addition to the romance and adolescent angst affiliated with teen generic discourse, we also have the fan-specific generic construct of domesticfic, as well as the domestic possibilities inherent in the fantastic element of male pregnancy (in fan terms, an Mpreg), a generic trope that cuts across fandoms and that raises complex issues of gender, identity, and experience.
2007 — Rebecca Traister, "Potterpalooza", Salon, 1 June 2007:
"Mpreg" is a radical subset of slash, in which male characters can get pregnant.
2008 — Clive Bloom, Bestsellers: Popular Fiction Since 1900, Palgrave Macmillan (2008), →ISBN, page 9:
Fantasies even include male pregnancy (Mpreg), the spontaneous growing of angelic wings and the manipulation of real celebrities known as RPF or Real Person Fiction.
