I'm sorry for going off topic, but...
It sounds like the Mom-to-be is planning on missing ALL the parks? That doesn't have to be! If her doctor has told her to avoid much walking - or if she has decided herself it is too uncomfortable - there is a simple solution.
Rent a "
scooter"! (Actually, they have a different official name, but i don't know what that is.) If you aren't familiar with them, they look like chairs mounted on wheeled platforms, with handlebars. They run on rechargable batteries.
We rented one for my mother a few years ago, and it was wonderful! The medical supply company had it waiting at our resort when we arrived, and we took it on all Disney transportation. I think the cost for 5 days was around $120. It was the best thing we had ever done, as my mom could never have gotten around the parks if she had to walk.
Also, just becasue she is pregnant doesn't mean that there is nothing for her to do in the parks. When I first visited WDW I was 6 months pregnant, and I never ran out of attractions to visit. Besides all of the shows, lots of attractions are very tame and safe for pregnant women. I'm sure if you visit the DIS family board you will get lots of advice.
Hope this helped! Nicole