There are two components to "eating right" when you're pregnant. One is the type of food you're eating, and the other is how much weight you gain.
For many women, pregnancy is the first time in their lives when gaining weight is a good thing-but don't go overboard. You do not need to consume any more calories than your normal daily intake during your first trimester. After the first 12 weeks, you may consume up to 300 extra calories per day.
If you are of normal weight when you get pregnant, you should gain between 25 and 35 pounds. Limit weight gain to no more than five to 10 pounds in the first 20 weeks, and about a pound per week for the remainder of your pregnancy.
Doctors strongly suggest, however, that if you are overweight, to try and lose some weight before you get pregnant. Women who are overweight have a higher risk of emergency cesarean, gestational diabetes, high blood pressure and miscarriage. There is also a greater risk of delivery complications.
Your health care professional will help you determine where you fall on the weight scale during your first prenatal visit.
As always, talk to your health care professional about any special dietary concerns (if you're vegetarian or vegan, for example).