I went when I was 11 weeks pregnant and I would echo a lot of what others have said. Go slow and take breaks when needed. Have her discuss with her doctor about rides and do what feels comfortable. I was a nervous Nelly as it was my first pregnancy, but I did everything that didn't have a height restriction including safari, pirates, frozen, etc. Safari can be very bumpy but my doctor said it was no worse than a bumpy car ride (and everything was fine in the end!). Definitely carry some small snacks with you in case she starts to feel hungry. My biggest issue is that I would start to feel very nauseous if I didn't eat right away, so having something small on hand is smart. I really liked to chew ginger gum which helped with any nausea I had. They sell it at CVS and Walgreens I believe. It's expensive but totally worth it! Another thing I really enjoyed having was a cooling towel. We went in September when it was VERY hot and I loved having a cooling towel to help keep my body temp down. Also in case you didn't know, you can go to any quick service or walk up food place and get water for free in case you don't want to carry a bunch of bottles. The only thing I hated while pregnant was that I couldn't ride the super fun thrill rides with the rest of my party LOL. But tons of fun can certainly be had, and I hope you and her have a wonderful trip. Congrats!