Depending on how pregnant you are you can get away with almost anything without being labeled something you're not.
1-Month- Alice in Wonderland
2-months- Fairy Queen
4-Months- Queen of Hearts
5-Months- Fairy (a lot of frills can distract from the baby bump)
6-Months- Bumble Bee (This can be cute or tacky, depends on how you go about it)
7-Months- Renaissance Woman (The dress tends to let loose right below the bust line)
8-Months- Greek Goddess (A lot of drapery and tends to be more comfortable.)
9-Months- Masquerade ballgown, it's the last month, might as well go out with a stunning dress and make-up before you have your little bundle of joy.