References American Pregnancy Association. Retrieved by http://www.americanpregnancy.org/birthdefects/downsyndrome.html Bible.com Colossians 1:16. Retrieved 23 Nov 12 by http://biblia.com/bible/esv/Colossians%201.16 Bible.com. Peter 1:27. Retrieved 23 Nov 12 by http://biblia.com/bible/esv/Colossians%201.16 Echo Web. Echo 202: Basic of Ultrasound. 2004. Retrieved by http://www.echo-web.com/html/echo-202free/echo202-1-body.asp?code=free Gordon Grant; Peter Goward; Paul Ramcharan; Malcolm Richardson (1 May 2010). Learning Disability: A Life Cycle Approach to Valuing People. McGraw-Hill International. pp. 43–44. ISBN.978-0-335-21439-6 "Health: Edwards syndrome". BBC. Retrieved 2012-0104.http://www.bbc.co.uk/health/physical_health/conditions/edwardssyndrome2.shtml Mary Kugler, R.N. (2005-08-20). "Chromosome 16 Disorders". About.com: Rare Diseases.About, Inc.. Retrieved 2008-01-30. http://ghr.nlm.nih.gov/exit? to=www.nih.gov&vje=7bH4sIAAAAAAAAAKvJKCkpsNLXLy8v18vLzNBLzy.TBwCdAvpwFAAAAA__ National Institutes of Health. What is a chromosome? 19 Nov 2012. Retrieved by http://ghr.nlm.nih.gov/handbook/basics/chromosome