Analyze the steps involved in the full implantation of the blastocyst into the uterine wall.

The blastocyst forms the placenta, preventing any interaction with the uterine wall.

The blastocyst adheres to the endometrium, trophoblast cells invade and erode tissue, and syncytiotrophoblasts facilitate nutrient exchange.

The blastocyst signals the endometrium to shed, marking full implantation.

The blastocyst divides into the embryoblast and cytotrophoblast, completing implantation.