I am so sorry for the loss of your daughter. My sister just went through the same loss on Feb. 8th. Her little girl had anencephaly also and she made the brave decision like you to interupt the pregnancy. I don't know what information that your doctors have given you but the odds of this happening again are very low, especially if the baby had no other problems. The odds for the first pregnancy are around 1 in 1000 and the increase slightly for the second but anencephaly is a neural tube defect that is related to folic acid deficency. If you take a folic acid supplement along with your prenatal vitamin for a few months before conceiving again your odds are extremely low for anencephaly a second time. I am an RN and my husband is a MD so we have researched all that we could to help my sister out and she herself has become very well informed on this subject. I hope this information helps and I wish you and your family all the best.