I am not pregnant and do not have kids yet, but I do plan to remain vegan when I am pregnant. My husband is omni, but we've decided to raise our child as a vegetarian (not vegan). My reasoning is simply, that I don't want my child to feel SO restricted they are the weird kid at birthday parties, can't eat school lunches etc. Mostly I am concerned that too much restriction young will make them backlash against vegetarianism all together. When they get older, they will be allowed to make their own decision. I guess I fall somewhere in the middle as I don't feel comfortable completely restricting their diet, but at the same time this "whatever their bodies tell them" argument sound like a bit of a crock to me. I remember when I was 5, my body clearly told me on a number of occasions that it wanted anything sugary and artificial and blue colored. Same with pregnancy. Your body can "tell you" a lot of crazy stuff.
Also, in regards to the possibility of something going wrong in vegan pregnancy but not with omni. This kinda stuff seems to be an across the board paranoia with pregnancy in general. People are the same way with the old midwife vs. hospital argument. "Well, the chances are slim but what if something happened during birth and if we were at a hospital it would be better etc." People freak themselves out so much about the "what ifs" when the facts clearly show that there is just as high if not higher likliehood that something can go wrong at a hospital. No basis in fact for this worry. Same with the diet. "I am going omni in the off chance that something goes wrong with the baby and I'm vegan. I could never forgive myself." Well, why? Because it is a fact that it is no less safe. If something goes wrong, it goes wrong regardless. Not because of factors that are clearly equal in risk.
Jeez, that was a mouthful. I've been thinkin about this for a while.