During which trimester is it recommended to add 452 calories to the basal requirement for total caloric intake, considering exercise?

The recommendation to increase caloric intake by 452 calories is primarily associated with the third trimester of pregnancy. During this period, the fetus is growing rapidly, and the mother's body undergoes significant physiological changes to support this growth and prepare for labor. The energy demand increases substantially in the third trimester, not only to support fetal development but also due to increased metabolic processes in the mother.

It is essential for pregnant individuals to meet these increased caloric needs, especially if they are also engaging in regular physical activity. This increase helps ensure that both the mother and the developing fetus receive adequate nutrition for healthy growth and development. Therefore, it is during the third trimester that a notable uptick in caloric needs, such as the addition of 452 calories, is typically recommended.

In contrast, the earlier trimesters do not require such a significant increase. During the first trimester, caloric needs are only marginally higher, as the fetus is not yet large enough to demand substantial energy. In the second trimester, the increase in caloric intake is moderate but does not reach the levels suggested for the third trimester. After childbirth, although caloric requirements may change due to breastfeeding or recovery, the focal point would not be geared towards the same caloric increase