What hormone level change is commonly observed during pregnancy?

During pregnancy, there is a notable increase in various hormone levels to support the developing fetus and maintain the pregnancy. Key hormones such as estrogen and progesterone rise significantly during this time. Estrogen levels increase to promote uterine growth and tissue development, while progesterone is crucial for maintaining the uterine lining and preventing uterine contractions. Additionally, other hormones such as human chorionic gonadotropin (hCG) and relaxin also increase to facilitate pregnancy.

The choice indicating increased hormone levels correctly captures this fundamental aspect of pregnancy hormonal dynamics, highlighting the body's adaptations to sustain both the mother and the growing baby.