Fetal membrane -overview Originate from blastocyst, don'tsoxM Amnion Embryo participate in the formation of yOlk sac embryo Charion Including )Chorion 2)Amnion 3Yolk sac 4)Allantois uMbilical cord Extraembryonic MembranesFetal membrane — overview •Originate from blastocyst, don’t participate in the formation of embryo •Including: 1) Chorion 2) Amnion 3) Yolk sac 4) Allantois 5) Umbilical cord