Like Kaylee said, no water slides. They could really injure the baby at any point in the pregnancy. Lazy rivers and wave pools are okay though. Just be careful and have fun! :)
I went to a water park at 30 weeks. My doctor said no to the water slides, so I did the lazy river and the wave pool. It was pretty nice :)
I don't think they're safe at any point in pregnancy because you could injure yourself. In fact, for liability reasons, I don't think waterparks allow pregnant women on the slides or rides?