There are many things you can do in order to make your maternity photos stand out. The first one is envisioning at exactly what style or or feel you'd like your images to look like. Some pregnancy photos can have a romantic dark and moody feel. Some lean on the side of bright and airy. Some of my personal favorites have a high fashion editorial esthetic to the images. Your goal is deciding what type most closely fits your own personal taste in maternity photography. This will help in the future as well when searching for a newborn photographer as you can match that style after your beautiful baby is welcomed into the world.