What physiological change typically occurs during pregnancy that affects blood pressure?

During pregnancy, one significant physiological change is the decrease in systemic vascular resistance, which leads to lower blood pressure, especially during the second trimester. This decrease can cause blood pressure to be lower than the typical non-pregnant levels, potentially resulting in light-headedness or dizziness when a pregnant person stands up too quickly, a condition known as orthostatic hypotension.

As the growing uterus exerts pressure on blood vessels, particularly in the later stages of pregnancy, it can further influence hemodynamics, which may contribute to fluctuations in blood pressure. Therefore, the correct answer highlights this common occurrence and the resulting symptoms that can come from such physiological adaptations during pregnancy.