Huh? You might be asking with a subject like that, I'm talking about regular clothes that work well as maternity clothes, which means you could even wear it once the bun is out of the oven.
These long Ella Moss dresses which are on sale would make great summer dresses both for those of us who aren't pregnant and those of you who are, when Angelina Jolie was pregnant with her twins she was often photographed in regular long dresses that worked really well. Here are a couple options -
I would suggest ordering up a size if you are going to wear this while pregnant, to make sure it fits properly over your growing chest...and then you will also be able to wear it while breast feeding, how convenient...
I wouldn't try it with short dresses because the belly will raise up the hem and in a short dress it could be quite obvious (maternity dresses are made with extra fabric in the front to prevent that) but lucky for you, the maxi-dress is still huge this summer.