So basically in this case, we have the breaking of these cells so that the embryo can actually make its way. But once it makes its way into the endometrium, we have blood clots that are formed within this area and eventually these new epithelial cells reform this epithelium and now the entire embryo is found entirely inside the endometrium. Now what happens next? Well, after about 25 days following fertilization, we have something like this. Basically what happens is now we no longer have a temporary connection between the mother's blood vessels and the coriane portion of the embryo. Now we have a direct connection between the Coryon and the uterine blood vessels.