You should read Gold Gray. I love it sm
Unromantic
Unromatic is a gem!
Yes it's my second favorite ov story after Love Shuttle's main story not it's side. I didnt mention LS because the there is mpreg but no baby shown. There is also Heat and Run which has several couples over the course of the story with mpreg for just about all of them if I recall. Also Butler is pretty good one too. I'm sure I know more and if I remember I'll post them.
Also if anyone has any more pregnancy tropes apart from love is an illusion, bloodlink origin of species plzzzz let me know, webtoon manga anything works