The only few that I'm thinking of going on are Soarin', Ellens Energy, Spaceship Earth, and Nemo.
There are no restrictions on any of those attractions that you want to go on.
You can look at the park maps for the attractions with warnings - they are marked with a red triangle on the map and also on a sign at the entrance to the queue.
This is a list of all the attractions that WDW has placed a warning on.
For
Epcot here are the attractions with warnings:
For
Magic Kingdom:
- Splash Mountain
- Big Thunder Mountain Railroad
- Tomorrowland Indy Speedway
- Space Mountain
For
Disney Studio
- Star Tours
- Rock N Roller Coaster
- Tower of Terror
For
Animal Kingdom:
- Kilimanjaro Safari
- Kali River Rapids
- Expedition Everest
- Primeval Whirl
- Dinosaur
Soarin' doesn't have any warnings that would affect pregnancy; just heights and possibly motion sickness.
The Safari and Kali River Rapids at AK are listed because you can get unexpected hard bumps and drops during the course of the ride. The Safari is less bumpy closer to the front, but it is still bumpy. We sit in the front seat because youngest DD needs to stay in her wheelchair; we still get bounced around a lot. It all depends on which ruts your ride car hits.
G forces are the reason for not riding Splash Mountain. The big drop takes you down at a very extreme angle at a high rate of speed (I think you get to 40 mph). At the bottom, your ride car stops abruptly. That sort of combination of fast speed drop at an extreme angle and then abrupt stop can theoretically cause placental abruption - where the placenta actually peels away from the wall of the uterus. That's the main reason for warnings at Splash Mountain.
For rides like Dinosaur, Star Tours, Test Track, Big Thunder Mountain you are not moving that fast, but can experience sudden changes of direction that jerk you around a lot.