What Attaches Itself To The Uterine Wall?

What Attaches Itself To The Uterine Wall? Implantation is when a fertilized egg, or blastocyst, has attached to the lining of the uterine wall. What is the process of the zygote attaching to the uterine wall? implantation – the process by which the zygote attaches to the uterine wall. What attaches to the uterine wall?