I'm not completely sure I understand the assignment fully but I found a poster about unplanned pregnancy. I think the style of it generally reflects a lot of the old fashioned portraiture from the 1800's as far as composition. There is a higher contrast that adds a more dramatic and somber tone to the overall piece. The message of the poster is very straightforward and direct and accomplishes its goal.
http://gldesign.files.wordpress.com/2009/08/unplanned_preg-copy.jpg
