Well, there’s the ALIEN franchise and ROSEMARY’S BABY and stuff, but those are obvious choices. In no order:
1. One of my faves is BABY BLOOD. Haven’t ever seen another movie quite like it.
2. It doesn’t *quite* fit your specifications, but DEMON SEED is a movie about a supercomputer that impregnates a woman, and it is very good.
3. GAKIDAMA is about a small demon that inhabits hosts like a parasite and is full of pregnancy and parenthood themes.
4. Of the “Satanic cult only wants me for my womb” movies, I liked Soavi’s THE SECT
5. THE BROOD might be my favorite Cronenberg movie
6. THE SUCKLING is a weirdo horror about an aborted fetus that comes into contact with chemicals, so it mutates into a giant monster and comes back for revenge
7. THE MANITOU is more of a growth than a pregnancy, but what’s the difference really?
8. Most of it isn’t about pregnancy, but SLITHER has some good weird stuff in it.
9. ANTIBIRTH was decent and different from a lot of modern sci-fi/horror
10. DEVIL FETUS has very little to do with the subject matter, but is too fun to pass up.
You may also want to try: PREVENGE, STILL/BORN, INSIDE, GRACE, HUNGRY HEARTS, and DEVIL’S DUE. I can’t vouch fer any of em because I haven’t seen them, but I’ve heard good things about a few and I think they all fit the subject matter.
Moviesludge 