One of the best resources on-line about birth defects is the March of Dimes page at: http://www.noah.cuny.edu/pregnancy/pregnancy.html Of course, the March of Dimes thinks sickle-cell anemia is a "birth defect," and I never let my son with Down Syndrome be a local spokesperson for March of Dimes because I'm not interested in viewing him as an abomination that should be prevented....but really, this is a good site, with lots of info about many different conditions. ---------------------------------------------------------------------------- ------- Katherine A. Dettwyler, Ph.D. email: [log in to unmask] Anthropology Department phone: (409) 845-5256 Texas A&M University fax: (409) 845-4070 College Station, TX 77843-4352