Nearly 50 percent of all new mothers experience some form of depression in the weeks that follow child birth, usually mood swings that range from euphoria to intense sadness and may last several weeks. But 10 to 20 percent of women may have a more severe and long-lasting form, postpartum depression. Have you had postpartum depression? We'd like to know how your mood has been affected by sleep or lack of sleep. Your comments may be used for a future ABCNews.com story.