Earth-3490
In the continuity of Earth-3490, Tony Stark was born a woman (Natasha Stark) rather than a man; Stark's superhero alter-ego in this universe is Iron Woman. The Civil War between superheroes in Earth-3490 was averted due to the fact that Stark and Steve Rogers (Captain America) are romantically involved, and have since married.
Read more about this topic: Alternative Versions Of Iron Man