There's a new one by Heydouga out http://en.heydouga.com/moviepages/4037/303/index.html
You'll find it on torrenting sites here, like this onehttps://sukebei.nyaa.eu/?page=view&tid=1910590
Alternatively, if you don't want to torrent, the only relevant bits with the pregnant woman and some other girl in it (there are three parts with two girls each, preggo is only in one part) are these two partshttp://jamo.tv/clip-186150-heydouga-4037-ppv303-p3.htmlhttp://jamo.tv/clip-186153-heydouga-4037-ppv303-p4.html
Using a good adblock makes the site easy to use, and the quality is quite good as well - for a streaming website. There's nearly two hours worth of content, but I can't vouch for it's quality. I enjoyed it, at least.
I'm not too sure on the censored side of things, but I know at least for the uncensored stuff you'll some of it uploaded on to that site under the pregnant tag (some things are mistagged though and has no pregnancy)http://jamo.tv/genre-52/1-pregnant-woman.html
Otherwise, just keep an eye out for releases by Pacopacomama, Heydouga, Gachinco (their content interlaps, so you'll find the same things on their different sites) and some of the other uncensored JAV producers, you'll be bound to find new content as it comes out. Just going through their recent videos on their sites while typing this has resulted in me stumbling on some new content, so if you search you'll find loads. Just google the title or keywords and you'll find a streamable or torrentable version.