Endometrial stroma Uterine Blood vessel gland Syncytio · trophoblast Surface epithelium 505 cYtotrophoblast Amnioblasts Epiblast Blastocyst cavity Hypoblast Amniotic cavity
Trophoblastic lacunae Enlarged blood vessels syncytiotrophoblast Cytotrophoblast 0/ Amniotic Epiblast 00 H 000 000 Exocoelomic(Heuser's Exocoelomic cavity membrane (primitive yolk sac) Fibrin coagulum
Trophoblastic lacunae Maternal sinusoids 9:69 Endoderm -Extra-embryonic Extra-embryonIc 0 3 Ro/ 2 02a00680030splanchnopleuric mesoderm Extra-embryonic Exocoelomic cavity Exocoelomic somatopleuric mesoderm (primitive yolk sac) membrane
Prochordal Primary stem Trophoblastic plate villi lacunae Maternal Connecting Amniotic secondary olk sac bryonic ample oder (chorionic plate) Extra-embryonic coelom (chorionic cavity Exocoelomic cyst
334条件 1)透明带准时消失 2)幼胚正常发育和运输; 3)子宫内膜在分泌期; 4)内分泌调节正常 Intestinal loop 335异常植入 Mesentery 前置胎盘 Body of uterus Uterine tube °植入部位近子宫颈 管内 °胎盘可阻挡胎儿娩 of 出,妊娠晚期及产 时大出血
3.3.4 条件 1) 透明带准时消失； 2) 幼胚正常发育和运输； 3) 子宫内膜在分泌期； 4) 内分泌调节正常。 3.3.5 异常植入 前置胎盘 • 植入部位近子宫颈 管内口； • 胎盘可阻挡胎儿娩 出，妊娠晚期及产 时大出血