Why is it important for the embryo to implant itself in the wall if the uterus?

Implantation of the embryo in the uterine wall is crucial for establishing a successful pregnancy. This process allows the embryo to access nutrients and oxygen from the mother's bloodstream, facilitating its growth and development. Additionally, implantation secures the embryo in a protected environment, where it can develop without interference from the external environment. Without successful implantation, the embryo cannot sustain itself and will not survive.