What is the primary role of estrogen in pregnancy?

During pregnancy, estrogen plays a crucial role in the development and maintenance of the uterine lining, making it fundamental for a successful implantation of the embryo and supporting fetal growth. As pregnancy progresses, estrogen levels rise significantly, leading to the continued growth of the endometrium and ensuring it is adequately prepared to nourish and sustain the developing fetus.

The hormone's effects on the uterine lining include the stimulation of blood flow and nutrient delivery to support the embryo, as well as promoting the growth of uterine cells. Estrogen also plays a part in regulating other hormones crucial for maintaining pregnancy, reinforcing its central role in reproductive health.

While other hormones and factors are important in pregnancy and maternal health, such as maintaining blood glucose levels or promoting bone health, they are not the primary function of estrogen during this specific period. Additionally, enhancing kidney function, though important in pregnancy due to increased renal blood flow, does not directly relate to estrogen's primary role during this time.