Well, there was a group/commune that adhered to a pretty strict veg*n diet in the 70's, I believe. They were called "The Farm". The book "vegetarian baby" takes some of their research nut'n numbers from that "project". I also have a cookbook put out from the farm. It's called "the new farm vegetarian cookbook" , Hagler & Bates. It has info on vegan pregnancy and experiances FROM the Farm and the pregnancies.
Hope this helps!