What physical changes commonly occur in a woman's body during pregnancy?

During pregnancy, a woman's body undergoes significant physical changes to support the developing fetus, and the correct choice highlights some of the most prominent changes. Weight gain is expected as the body adjusts and prepares for the growing baby, amniotic fluid, and additional maternal tissue. Breast enlargement is another common change, stimulated by hormonal fluctuations, particularly increased levels of estrogen and progesterone, which prepare the breasts for lactation. Additionally, there is an increase in blood volume, essential for supplying oxygen and nutrients to both the mother and the fetus, facilitating metabolic processes, and preparing for the increased circulatory demands of pregnancy. These changes are crucial for the health of both mother and child and are closely monitored throughout the pregnancy to ensure that both are thriving.

The other options do not represent typical physical changes associated with pregnancy. Instead, they suggest alterations that do not align with common experiences during this time, such as a decrease in metabolism and energy levels or a reduction in body temperature, which are generally not observed and may reflect misunderstanding of the physiological adaptations that occur during pregnancy. Increased sensitivity to cold is also not characteristic of pregnant women, who often experience increased metabolism and body temperature due to heightened blood volume and hormonal changes.