It seemed that all of the pictures I found sported a sash around the waist and while I never wore it during labor, it's pretty essential for pictures to help define that baby bump.
I decided to go for a sleeveless version after I followed the free pattern for a hospital gown found at Lazy Girl Designs and found that it pretty much looked like a big sack - which is just what hospital gowns look like, but certainly not the look I was going for. So I used their pattern - did I mention it's free? and then... I took my scissors to it. And I basically cut it down to the size of the dress shown in the picture below with an allowance for the seem. Yes, it was bold. No, it was not perfect. But hey, most people don't sew these days, so most people were easily distracted by the matching headband and flower sash.