What are the functions of hormones estrogen and progesterone during pregnancy?

During pregnancy, estrogen and progesterone play crucial roles in supporting fetal development and preparing the mother's body for childbirth. Estrogen promotes uterine growth, enhances blood flow to the placenta, and regulates other hormones, while progesterone helps maintain the uterine lining, prevents premature labor, and supports the immune system to tolerate the growing fetus. Together, they ensure a stable environment for the developing baby and facilitate the necessary physiological changes in the mother.