Sure, basic black can be boring, and you don't want to wear it every day throughout your entire pregnancy, but a simple sheath like this one with sweet accents like a peter pan collar are both pretty and forgiving.
A gorgeous, tailored coat with plenty of structure through the upper body will help give you a defined silhouette, but allow room for your bump to grow.
Your middle may be growing in ways it never has before, but your legs can still look killer. Show them off in a short dress and a great pair of (not too high) heels.
Instead of draping your pregnant body in what often feels like a tent, try a form-fitting knee-length dress. It will proudly display the bump and actually make you look more slender than any maternity maxi ever could.
Let's face it, the empire-waist is a pregnant woman's best friend. Just make sure the dress actually fits. If you size up too much, the extra fabric won't do you any favors. Go with something that offers a little structure, like the dress Kate dons here.