Gap: For your basic t-shirts, camis and sweaters.
Topshop: Affordable and stylish, get your style on without the price!
Isabella Oliver: Based out of the UK, they ship to the several countries, including the US. They have a very large celebrity following and the prices are 100% reasonable. Loving their small but ideal jacket selection.
ASOS: Dresses galore! I adore this retailer already and having fantastic maternity pieces makes me love it even more!
ShopBop: Great selection of maternity jeans, I have heard great things about the J Brand Mama J Skinny Jean.
Zara: While they don't carry a maternity line, I have found several pieces that work wonderfully with the belly.
Oh, and just a reminder for all my pregnant friends. On those days when you feel like nothing fits, throw on a simple black dress, tights and heels (the highest you can tolerate), then layer on a statement necklace and bangle bracelets. You will feel and look like a million bucks :)