Additional
Information: Anomalous conditions present at birth as a result of either hereditary or environmental influences during prenatal development, often referred to as birth defects. This page was last updated on September 7th, 2008
The Merck Manual
A discussion about congenital anomalies and its causes, diagnosis and its treatment. http://www.merck.com/pubs/mmanual/section19/chapter261/261a.htm