What is a key role of estrogen during pregnancy?

Estrogen plays a crucial role during pregnancy, particularly in facilitating the growth and development of the uterus. During this period, estrogen levels increase significantly, which is essential for preparing the body for the demands of supporting a growing fetus. One of its key functions is to increase blood flow to mucous membranes and stimulate the growth and vascularization of the uterine tissue. This ensures that the uterine environment is optimal for the developing fetus and aids in the overall maintenance of pregnancy.

Increased blood flow also helps provide necessary oxygen and nutrients to the developing tissues while promoting the efficient removal of waste. The stimulation of uterine development by estrogen is fundamental to accommodate the expanding fetus and is a vital component of a healthy pregnancy. Thus, this choice accurately reflects the significant physiological changes driven by estrogen during this critical time.