Pregnancy

#1  Mother Nature
 
This costume can be created in several different ways.  You can use a green dress or shirt as shown in the photo and add an image of the Earth to the front over the belly.  Add flowers and makeup and you are done.  You can also take a more simple approach with flowering vines draped over a toga and a little sash that says "Mother Nature”.  You could also purchase a Mother Nature costume.

#2  The Pregnant Nun 
 
This is an irreverent and off-color costume.  If you wear this, you need to make sure the other people at your party have a good sense of humor and are not easily offended.  Chances are, you can pick up a nun costume and priest costume or Bishop costume at your local costume rental shop. 

#3  Santa Costume 

If you want to keep the pregnancy low-key, a Santa Claus costume is a good way to do it.  Your pregnant belly will fill the costume and no one will know if it is real stuffing or not.  Costume shops have Santa Claus costumes regularly available. 

#4  A Shotgun Bride

This is a fun costume and quite easy to make.  All you need is a veil and a white dress.  (It also helps if you have an imposing looking man carrying a shotgun with you.)  Of course, you could also purchase a bride costume at the local costume shop or online.

 
 
#5  Beer Belly 
 
The beer belly is also an easy costume to pull off when you're pregnant. All you need is manly looking clothes such as jeans and a flannel shirt, with a sleeveless undershirt (called u-shirt, ganzee, or wife-beater), a short wig, a baseball cap and your pregnant belly.

Looking For More Pregnant Halloween Costumes?

In addition to these fun and easy-to-find (or make yourself) costumes, here are some places to find other ideas for a pregnant Halloween costume:

About.com has a cool gallery of Halloween costumes for pregnant women.  Some of the ideas pictured there include painting the belly as a pumpkin or basketball, or wearing a Scooby Doo costume.

Amazon.com has several pages of maternity Halloween costumes to choose from -- including: a baker/chef/cook, an angel, a devil, a pirate, a funny tourist, and a hillbilly honeymoon bride, among others.
 
Keep in mind, some everyday costumes look just as good if not better in the pregnant version. Think: a fairy or princess. You'll certainly attract a lot of smiles.

BuyCostumes.com has a multi-page gallery featuring Halloween costumes that work week for a pregnant woman. 
 

Here are 7 more great Halloween costumes for pregnant women.