Which metabolic changes during the first trimester of pregnancy should the nurse explain to a client who just confirmed her pregnancy?

During the first trimester of pregnancy, one of the significant metabolic changes is an increase in sleep needs. This is largely due to the hormonal shifts that occur as the body begins to support the developing fetus. The increase in progesterone can lead to fatigue and a greater need for rest, prompting many women to feel the desire to sleep more than usual.

Understanding these changes is essential for pregnant individuals, as adequate sleep is critical for both maternal health and fetal development. In the early stages, the body undergoes various physiological adjustments, and recognizing the need for more sleep can help the client prioritize their self-care during this unique time.

While there are other metabolic changes during pregnancy, such as shifts in caloric requirements and iron absorption, they don't align with the context of this question. For instance, caloric needs will generally increase, and iron absorption actually improves to support increased blood volume. Thus, acknowledging the rise in sleep needs emphasizes the body's requirement to adapt and prepare for the demands of pregnancy.