Hello Cherie and Rex,
When I originally saw the Neurosurgeon about my AVM, I was told that it was generally a benign condition that had most probably developed in-utero. However, they have been keeping a close watch on it to make sure it hasn't grown any. I was told that there was a very slight possibility that it could develop into an aneurysm, especially during pregnancy because of the increase in blood flow. I have had this link bookmarked, and refer to it frequently. Thus, my reason for questioning the possibility that she could have had an AVM.

We've had a few young ladies in our practice who have had aneurysms at very young ages. I don't believe any of them were due to an AVM to my knowledge. This link is very interesting and is quite comprehensive in it's explanation of what an AVM is and the slight possible consequences of living with this condition.

http://www.ninds.nih.gov/disorders/avms/detail_avms.htm

All the best,
Chris