Go to archiveofourown.org and use the search filters to search for "pregnancy" in the Gore tag. You'll get about 400 stories.
Or, you could commission me! My email is firstname.lastname@example.org.
(Yeah, I'm plugging this a lot, but I'm broke. I'm also one of the better writers who's willing to write gore and scat. I'm a resource.)
Thank for the help
One with a girl cut in half who lives and sees all