What is the concern with roller coasters and pregnancy?
The concern with roller coasters during pregnancy is associated with the rapid starts and stops along with jarring that occurs during the ride. This rigorous activity creates additional jarring forces within the uterus that may lead to premature separation of the placenta from the wall of the uterus, which is called placental abruption.
Currently, there are no studies that document a problem with roller coasters while you are pregnant. Similarly, there are no studies documenting that it is safe either. Automobile accidents have caused placental abruption and other complications for women who are pregnant even when the trauma is not directly to the uterus.
Although there have been pregnant women who have ridden a roller coaster without complication, it is a risk that should be avoided. Amusement parks are good at identifying rides that pose risks to pregnant women.
Pregnancy and Roller Coasters: Recommendations
The safest course of action is to play it safe and avoid the rides that pose a risk; you can always return to the park and ride things after you deliver.