Prenatal vitamins: Many of the foods eaten during the vegetarian diet are full of vitamins and healthy nutrients. When in doubt, a vegetarian prenatal vitamin should be taken.
Eat often: Research has shown that eating your vitamins and nutrients means far better absorption than supplementing with vitamin pills. Also with certain elements being dumped from the body after the body uses all it needs (example: B vitamins), the pregnant vegetarian should eat multiple times a day.
Plan meals ahead of time: No one has the time to sit around all day and fix vegetarian meal after meal. This is why it is important to know the numbers you need to hit and focus your meal planning on the best possible RDA outcome.