I believe this deserves an honorable mention.

It used to be on fimfiction, but the author got spooked and nuked his entire account.

2017037

Well, at a glance, I'm thinking that a NSFW warning next to the link would be nice.

On topic, I quite like the idea of having a thread for stories that aren't on FiMFic, since not everyone likes coming here.

2017282
Oops, good point!

While I think a separate thread for all of that does sound pretty cool, I at least don't know what I'd really put in it. Most fics I knew of with pregnancy in them before fimfiction were in heroku which even if I could get the fics that were listed in there, I can't really remember them...The only other source for prego ponies that I know of are large, messy greentext threads.

2017622

Well, I do know there are one or two writers on dA. Though that said, it really isn't writer friendly in the end. On the other hand, fanfic.net probably has a good amount of stories that aren't here. I may have to return there and do some browsing.