Final answer:
During pregnancy, the increased need for energy averages about 300-400 kcal/day.
Step-by-step explanation:
During pregnancy, the increased need for energy averages about 300-400 kcal/day. This additional energy is required to support the growing fetus, maintain the metabolism of the fetus and placenta, and provide energy for the extra work of the heart and respiration. It is important for pregnant individuals to consume an adequate amount of calories to ensure a healthy pregnancy.