Final answer:
During pregnancy, a woman typically needs 300 to 400 additional calories per day to support the growth of the fetus.
Step-by-step explanation:
During a typical pregnancy, a pregnant woman typically needs about 300 to 400 additional calories a day to support the growth of the fetus. Most of these extra calories are needed during the last trimester, when the fetus is growing most rapidly. It is important for the mother to consume nutritious foods and take in enough nutrients for both herself and the fetus, including extra calories, proteins, lipids, vitamins, and minerals.