My doctor is completely fine with my vegan diet while being pregnant. She gave me a quick quiz on how I get my calcium, protein, etc. and clearly I passed with flying colors. As long as you know how to eat a well balanced healthy diet and aren't eating all sweets and fried foods your baby will be just fine - in many ways better(your prone to much less pesticides in your system than meat eaters)! Of course its always good to take a prenatal vitamin regardless of being veg or meat eater.