Final answer:
A normal-weight woman should gain approximately 25-35 pounds during pregnancy.
Step-by-step explanation:
A normal-weight woman should gain approximately 25-35 pounds during pregnancy. During the first trimester, the mother does not need to consume additional calories to maintain a healthy pregnancy. However, a weight gain of approximately 0.45 kg (1 lb) per month is common. During the second and third trimesters, the mother's appetite increases, but it is only necessary for her to consume an additional 300 calories per day to support the growing fetus. Most women gain approximately 0.45 kg (1 lb) per week.