Why do fertilized eggs attach to the uterine lining?

Fertilized eggs attach to the uterine lining to establish a connection with the mother's blood supply, which is essential for providing nutrients and oxygen for the developing embryo. This attachment, known as implantation, occurs when the embryo releases enzymes that help it burrow into the uterine lining, ensuring a stable environment for growth. Additionally, this process triggers hormonal changes that support pregnancy and prevent menstruation.