ectoplacental

ec·to·pla·cen·tal

(ek'tō-plă-sen'tăl),
1. Outside, beyond, or surrounding the placenta; in primates, referring especially to the parts of the trophoblast not directly involved in the formation of the placenta.
2. In rodents, referring to the actively growing part of the trophoblast involved in the formation of the placenta.
References in periodicals archive ?
On the 8th day of rat gestation, the trophoblast proliferates and gives rise to the ectoplacental cone and on the 9th day maternal lacunae without endothelium are being developed within this ectoplacental cone [5].