develops from trophoblast cell extravillous trophoblast endovascular extravillous trophoblast cell 2024-01-08T15:43:32Z Shortly after implantation, the endovascular extravillous trophoblast cells occlude the maternal spiral arteries, preventing premature oxygen delivery to the placental villi and reducing fetal oxidative stress. A trophoblast cell that invades the maternal spiral arteries and replace the endothelial lining, remodeling the vessels and allowing for adequate blood transport into the placenta. An endovascular extravillous trophoblast cell differentiates from an extravillous trophoblast cell. In humans, this cell can be distinguished by the expression of CD56. endovascular trophoblast eEVT endovascular extravillous trophoblast