Remember the worst-case rumors that the baby might be an alien? these fics the baby's other parent isn't human.

new ficFive Twinkies, an Alien Baby, and Chris Carter by mysterygirl1
Having My Alien Baby by Alelou's Evil Twin
Junior by Poet
Lamb by LostInOblivion
new ficThe Mettle of Honor by N. Y. Smith
Miracle Season by Neoxphile (Fowley's sons)
Mulder's Other Baby by Neoxphile
Mulder's Son by jrfpatton
Shoulders by Missy J
new ficThree Men and a Baby (Alien!) by David O.
Unknown Lives by Donna

Didn't find exactly what you're looking for? We could always use more new additions. Consider penning a fic for our related challenge :)

The Nursery Files