What is the primary function of the uterus?

The primary function of the uterus is to house the developing fetus. It provides a safe and nurturing environment for the embryo and later the fetus as it grows during pregnancy. The uterus is equipped with a thick, muscular wall that can expand as the fetus develops, as well as a rich blood supply that supports fetal growth and provides essential nutrients. Additionally, the lining of the uterus, known as the endometrium, thickens in preparation for potential implantation of a fertilized egg, further emphasizing its role in supporting pregnancy. While the uterus also plays roles in hormone production, facilitating the passage of the egg, and assisting in the birth process, its most critical function centers around creating an optimal environment for fetal development.