You have chosen your bridesmaids and have looked at dresses and then..."I'm pregnant"! One of the girls is going to be pregnant for the wedding. There are companies that carry a line of bridemaid dresses, like this on by Jim Hjelm. Eden Bridal is another one. But, if you want all the girls to be in the same dress, chose something that has an empire wasit so that extra fabric can be purchased to make a panel in the front of the pregnant girl's dress. A good seamstress can do that when the dresses come in and it turns out very well.