And during that process, the blastocyst actually implants itself onto the endometrium, the lining of the uterus. Now, as soon as implantation takes place, the Trophy blast cells of that blastocyst begin to produce digestive enzymes. And these digestive enzymes are released into the surrounding tissue of the endometrium. And what those digestive enzymes do is they begin to break down and digest the vascular and connective tissue found inside that endometrium. And that not only allows the embryo to make its way entirely into the endometrium, but it also forms these tiny extensions, tiny projections known as the Corianic villi. So the purple section is the Coriane that develops from the Trophy blast of that blastocyst that implants itself onto the endometrium.