Arteriovenous malformation. Arteriovenous malformation (AVM) is an abnormal connection between arteries and veins, bypassing the capillary system. This vascular anomaly is widely known because of its occurrence in the central nervous system (usually cerebral AVM), but can appear in any location.
Since fetal alcohol syndrome covers a wide range of problems, there are many possible symptoms. The severity of these symptoms ranges from mild to severe, and can include: 1  a small head.  a smooth ridge between the upper lip and nose, small and wide-set eyes, a very thin upper lip, or other abnormal facial features.
Lastly, Fetal Alcohol Syndrome (FAS) is a medical condition. However, among these common causes, only FAS is completely preventable. Medical Causes of Intellectual Disabilities. Pre-and post-natal exposure to alcohol, drugs, toxins, and certain infections can have a devastating effect on brain development.