What is the main function of estrogen in pregnancy?

The primary function of estrogen during pregnancy is to maintain the endometrial lining. Estrogen plays a critical role in preparing and sustaining the uterine environment to support the developing fetus. It promotes the growth and differentiation of the endometrial tissues, which is essential for the implantation of the embryo. This hormone also enhances uterine blood flow, providing the necessary nutrients and oxygen for fetal development.

In addition to its role in the endometrium, estrogen contributes to various physiological changes throughout pregnancy, such as increasing the size of the uterus and stimulating the development of breast tissue. Its influence on the maternal body is vital for creating an optimal environment for the pregnancy to progress successfully.

While estrogen is involved in other pregnancy-related functions, such as modulating mood and preparing the body for breastfeeding, its fundamental role in maintaining the endometrial lining is central to its function during pregnancy.