I don't know nothin' 'bout birthin' babies, but I do know they're robust little beasts. Some of the people who I meet as clients smoke through their pregnancies, eat nothing but crisps, pepparami and Mcdonalds, and wash it all down with energy drinks. Their children suffer, no doubt: in three years of teaching in the community, I've seen a child with a hole in the heart and a couple of very early births, but they live and they are beautiful in their own ways.
I was very careful about 'nutrition' for about a month after I gave up dairy, and then I just sort of forgot about it. The best advice I found online was don't be hungry, be very careful about pre-prepared and packaged food, and vary your diet. It's all advice that would behove a meat-eater or even a cannibal to follow, but is extra valuable to a vegan, because we're not taking in anything like the poisons they're consuming and so, will enjoy twice the benefits. Don’t ignore it, of course, but get informed, then sort of let it drift into the background as you develop a collection of recipes.
If you want a good, reassuring and informative book on vegan living and health, can I recommend
The Heretic's Guide to Vegan Cookery by Andy Murray? It punctures the cod sanctity of 'spiritual' veganism, while talking in a calm and clear manner about enjoying vegan food and thriving on it. It is also quite funny.
Eat well, cook for yourself from basic ingredients as much as you humanly can, and don't get into a dietary rut. I second gab's advice about seeking out experienced guidance, because wisdom and childbearing go hand in hand throughout history, but I don’t think there any special hazards to pregnancy in veganism that aren't more than balanced by the advantages. So many of the 'health concerns' surrounding veganism in the mainstream media are simply FUD: Fear, Uncertainty and Doubt. The majority of humans throughout history have been fed on an overwhelmingly vegetable diet. We haven't died out yet.
