Archive for the ‘Uterus’ Category

In the rodent, the chorioallantoic placenta forms from the ectoplacental cone that differentiates into two regions that are morphologically distinguishable shortly after midgestation. These regions of the fetal placenta, termed the junctional and labyrinth zones, physically separate as the allantoic mesoderm invades the ectoplacental cone. Cells in the junctional zone contain the tropho-blast giant cells, […]

The emergence of the chorioallantoic placenta in euthe-rian mammals is a critical developmental process that brings the maternal and fetal vascular systems into close proximity thereby providing the fetus with the means to obtain nutrients, respire, and eliminate wastes. The failure to establish and maintain vascular circulation and the lack of transition from yolk-sac-based to […]