I think the person who asked about the sedation was just curious. Sedation is often used when taking x-rays. Just in this case, I'm sure they wouldn't. If she were to be too wiggly, which as wide as she may be now, she may not fight at all,
then they would simply not do the x-ray or just have her on her side...which is more common anyway.
CONGRATS! I hope she has a smooth delivery and you've GOT to post up some photos of the new mommy and her wee ones when you get a chance.