What are common physical changes during the third trimester of pregnancy?

During the third trimester of pregnancy, various physiological changes occur as the body prepares for labor and delivery. Swelling, also known as edema, is common due to increased fluid retention and pressure from the growing uterus on blood vessels, particularly in the legs and ankles. This can also lead to increased fatigue as the body works harder to accommodate the expanding fetus and the growing demands on maternal resources.

Increased fatigue is frequently reported in the third trimester due to several factors, including disrupted sleep patterns, physical discomfort, and the overall energy expenditure involved in supporting the developing baby. As the body undergoes these changes, women may find themselves needing more rest.

The other options reflect symptoms that are either less typical for this stage of pregnancy or may occur in earlier stages. For example, increased appetite might be more characteristic of the second trimester. Frequent headaches and nausea can occur early on or due to other conditions, but they are not hallmark symptoms of the third trimester. Weight loss and mood swings are also not typical of this stage, as weight gain is expected as the baby grows. Thus, B accurately captures the common physical changes experienced in the third trimester.