Microscopy image of a day 14 human embryo that has implanted in the new endometrial model. The bright blue cells in the center of the image are unspecialised epiblast cells that later in development form all of the tissues of the body. The orange-colored cells are trophoblast cells that will later form the placenta. The blue cells surrounding the embryo are endometrial cells that support embryo implantation and growth….