Mpreg, short for male pregnancy, is a trope in fiction in which male characters become pregnant. Commonly found in fanfiction, particularly in slash fiction, mpreg explores themes of gender, identity, and societal norms. It has also appeared in mainstream media, where it is variously used for comedic, dramatic, or fantastical purposes.
Mpreg fiction frequently normalizes male pregnancy within its fictional worlds, allowing authors to focus on interpersonal relationships, domestic life, and emotional bonds rather than biological or societal conflicts. While the trope presents opportunities to challenge traditional gender roles, it has also been criticized for reinforcing traditional gender norms and overwriting female experiences. The trope intersects with broader discussions of gender and sexuality, though it is typically portrayed outside the context of transgender experiences.