To this I am wearing a white oversized blouse — first I wanted to combine a classy, tight blouse, but I found it a bit too traditional and boring. (thefashionrose.com)
Also, oversized blouses in white or blue look really lovely. (thefashionrose.com)
In the meantime, leggings and sweaters (in the cooler weather) or even oversized blouses serve the purpose of comfort and presentation until you can begin wearing pregnancy maternity clothing. (pregnancy-info.net)