You are what you eat, so the saying goes. And now that you're going to be growing a tiny person inside of you, they're also "consuming" what you eat. Therefore, it's wise that you consume a healthy, well-rounded diet before, during and after pregnancy. The easiest way to do this is by following the U.S. Department of Agriculture's latest food guidelines. The pyramid was recently replaced with a healthy plate that more clearly depicts the portions and types of food to be eaten each day. The foods to focus on include vegetables, grains, protein, fruits and dairy -- in that order. Foods to avoid include high-sodium or sugary foods and drinks, seafood that stores high amounts of mercury, unpasteurized dairy, too much caffeine (200 mg or more), certain herbal teas, certain vitamins (including too much vitamin A) and unwashed food [source: Mayo Clinic].