I am so very sorry for your loss.I have done extensive research regarding neural tube defects/brain malformations, etc since my angel baby was born with alobar holoprosencephaly in 2003. In my case, the defect was caused by the medication I was on during the first 7 weeks of my pregnancy (anti-seizure med). There are studies that point to the medication being the cause, but since it cannot be proven, I was told it was simply a"fluke". I always thought it a disturbing term to describe the loss of a baby, but then I am a bit sensitive when it comes to that. Back to the research, most of the time they will say that there is no known cause, which is the case with anencephaly. Although, there is a current study concerning hazardous waste sites and the occurrence of birth defects. One of the birth defects included happens to be anencephaly. This is not proven, just an organization conducting a study.
http://www.asfhelp.com/asf/chemical_...defectsAnother good site:
Anencephaly Net ------