You may not get this before you go on your trip, but I hope it will help someone! Last year my family went to WDW when I was 6 mo. pregnant and my son was 15 mo. old. Doctor's only cautions were to be careful not to overdo and drink plenty of water. All the CMs were so wonderful! Everyone seemed to go out of their way to be sure that I was ok. I appreciated the concern! I followed the posted cautions on rides that were not appropriate for pregnant women and took frequent breaks (DS needed to anyway!). I was concerned before going (that I wouldn't be able to really enjoy everything), but it was a fantastic week!
Just be sure to use common sense and don't exhaust yourself!!!!
Jen C in MD
'80 - offsite
'96 - CBR (honeymoon)
'99 - CS
'01 - ASM