Early Implantation Site (40X)
Early Implantation Site (40X)

The villi are covered with layers of trophoblast and syncytiotrophoblast.
Growing downward (so called polar growth) are cords of trophoblast.
The villus stroma is loose, scant and does not yet contain fetal vessels.
(Description By:Linda Ernst )
(Image Contrib. by:Linda Ernst UCHC )