What is implantation, and what role do trophoblast cells play in this process?

Implantation is the process of fertilization, with trophoblast cells responsible for forming the embryo.

Implantation is the attachment of the blastocyst to the uterine wall, with trophoblast cells aiding in embedding the embryo into the endometrium.

Implantation refers to the division of the embryoblast, with trophoblast cells forming the placenta.

Implantation is the shedding of the uterine lining, with trophoblast cells involved in menstruation.