Standard medical advice and theme park safety regulations state that you should not ride roller coasters at any stage of pregnancy, regardless of how many months along you are. While some might think the early first trimester is "safe," the primary risk isn't just the "bump" area, but the intense G-forces, rapid jarring, and sudden stops that can cause "placental abruption"—a serious condition where the placenta detaches from the uterus. Most major parks like Disney, Universal, and Cedar Point have clear warning signs at the entrance of every thrill ride specifically advising pregnant women to stay off. In addition to the physical risks, the intense "adrenal dump" and potential for nausea can be much more severe during pregnancy. For a 2026 traveler, the best approach is to focus on "low-impact" attractions like boat rides, slow-moving dark rides, and shows. If you are in doubt, always consult your OB-GYN before your trip, but expect the "official" answer from the park's legal and safety teams to be a strict "no" from month one to month nine.