Yeah sorry I was mistaken its not omegaverse but like other have been saying the MC is able to give birth. He is a hermaphrodite which is "a person or animal having both male and female sex organs or other sexual characteristics, either abnormally or (in the case of some organisms) as the natural condition." Sorry for causing any misunderstanding hope this helps
Yep.
It's a real condition, it's only the "being fertile and able to get pregnant" part that is a bit of sci-fi (to my knowlege, there's been no case in real life like the one in the story...)
https://en.wikipedia.org/wiki/True_hermaphroditism#Fertility

Is this omegaverse?