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.
The wording for the general warning is:
WARNING! For safety, you should be in good health and free from high blood pressure, heart, back or neck problems, motion sickness, or other conditions that could be aggravated by this adventure. Expectant mothers should not ride.
As was pointed out already, these are recommendations; no one will stop you from riding unless you will not fit correctly into the restraint system.
For
Epcot here are the attractions with warnings:
- Mission Space the sign outside the attraction says that pregnant women are advised not the ride both the more tame (green side) and the more wild (orange side)
- Test Track - sudden stops at several points and if the attraction has an emergency stop at an unexpected time, it will be a very jerky stop.
For
Magic Kingdom:
- Splash Mountain - see below
- Big Thunder Mountain Railroad - the ride does whip you around quite a bit. Depending on the size of the people in the row, you may or may not get bumped around much.
- Tomorrowland Indy Speedway - small cars being driven by kids. Sudden stops and possibly getting your car rear ended. Also, some people find the gas fumes to be nauseating.
- Space Mountain - roller coaster
- Goofy's Barnstormer (this doesn't have a triangle warning sign on the map, but does say that pregnant women should not ride)
For
Disney Studio
- Star Tours - jerky simulator ride
- Rock N Roller Coaster -fairly smooth roller coaster with sudden acceleration and inversion.
- Tower of Terror - multiple drops
For
Animal Kingdom:
- Kilimanjaro Safari - see below
- Kali River Rapids - can get bumped hard
- Expedition Everest - roller coaster
- Primeval Whirl - like combining a roller coaster and the tea cups. You can get whipped around a LOT. My adult DDs wont go on because they were just thrown from side to side.
- Dinosaur - sudden stops, get thrown around a lot.
Soarin' doesn't have any warnings that would affect pregnancy; just heights and possible motion sickness. There are some scents used on the ride (ocean air, oranges, pine) that you may want to be aware of if you are sensitive to smells.
The Safari and Kali River Rapids are listed because you can get unexpected hard bumps and drops during the course of the ride. Some moms late in pregnancy have posted it felt like the baby was using their bladder as a trampoline, so it was not exactly comfortable. Many people suggest that 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. I have also ridden it without DD, and have found the farther back seats are about the same (unless you are talking about the back 1/3 of the tram). Also, the tram is quite far off the ground; in case of a problem with the tram, you will need to get off of the tram without aid of the boarding area which raises you closer to the level of the seats.
The main drop is 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 experience sudden changes of direction that jerk you around a lot.
