A broad vegetarian diet is ideal for pregnancy because it returns natural control of diet to the appetite mechanism, and allows the natural development of pregnancy, with its hormonal and physical changes.
Resist all cravings that take you outside the diet, but ensure that your diet is as broad as possible. Eat at least one meal with a portion of protein every day, and fill with wholemeal starch and vegetables if you are still hungry.
You are unlikely to put on excess weight while following this diet and maintaining your regular exercise.
You should maintain a some intake of fat, and dairy fat - cream and butter in moderation. It may be wise to avoid processed fats such as margarines and low fat spreads until the health effects of these are clearer.
Pregnant women should not eat vitamin A supplements because the high vitamin A levels can be toxic.