<prompt> The fetal blood is separated from syncytiotrophoblast with all the following exceptFetal blood capillary membraneMesenchyme of intervillous blood spaceCytotrophoblastDecidua parietalis  <response>: The decidua over the abembryonic pole is the decidua capsularis. The chorionic cavity becomes larger. the decidua capsularis is stretched and degenerates.The chorion leave now comes into close contact with the uterine wall on the opposite side, resulting in the formation of the decidua parietalis. 