Like Krista, I'm a lacto-ovo vegetarian (though I don't like eggs) and I never had trouble meeting my nutritional requirements. In addition, both my mother and mother-in-law are vegetarian and never had any trouble when they were pregnant.

Both Physicians Committee for Responsible Medicine and the Cleveland Clinic have nice entries on eating vegetarian while pregnant.

One cookbook I found helpful was The Vegetarian Mother's Cookbook by Cathe Olson. Most of the recipes in it are vegan or can easily be adapted to be vegan. Truthfully, the actual recipes weren't my favorite but I found it relatively easy to adapt and she has a lot of good ideas for meeting various needs. For instance, there are appendixes in the back listing specific recipes that are high in protein, calcium, and iron. Note: Olson suggests some natural remedies for things such as ginger for morning sickness which I would clear with your doctor before using (there are conflicting studies about its safety while pregnant). She also uses flaxseed for some recipes which the Mayo Clinic suggests avoiding during pregnancy (though when I asked my obstetrician about this she gave me a blank stare).

I found NutritionData to be a helpful resource as one of the features it has is the ability to look for foods high in a specific nutrient. However, I don't recommend their recipe interface as the last time I tried, it was pretty clunky. If you're looking for something like that, I preferred SparkPeople (though I haven't tried it in years).

I do! I am a lacto-ovo vegetarian, and have had two children. I did not find that it was all that difficult to meet my RDA's of nutrients while pregnant. I had previously started using www.fitday.com to do a nutritional analysis of what I ate, and continued it through my pregnancy. If she eats well, with a good balance of healthy food, I don't think she will have much to worry about.

She should likely ensure that her prenatal vitamin meets the RDA for any hard to get vitamins/minerals in her diet (in my case it was B12, zinc and iron). If she doesn't do a lot of dairy, a calcium supplement might also be a good idea. I take one regularly, and my OB had me double mine during pregnancy.

If she is worried about protein, there are many good sources of protein for vegetarians - cheese and nuts being my favorite.

I was a lacto-ovo vegetarian + fish when I became pregnant. I quickly found that it was hard for me to get enough protein. Fish wasn't always easy to come by, cheese was too fatty and greasy, and I started to crave chicken and even beef sometimes. I think that if I'd had more time, I could have been more careful about my diet and gotten all the nutrition I needed through vegetarian sources. But with a full-time job and being tired all the time, this was pretty tricky. Also, I was getting iron deficient, even with supplementation. It's hard for the body to absorb iron in non-animal forms.

Just wanted to throw another data point out there -- not meant to discourage her in any way. But she shouldn't beat herself up if she finds herself slipping at some point.