The chorion lies closest to the placenta. The chorionic sac encompasses the fetus and the amnion and is covered with chorionic villi until the 8th week. After the 8th week, these villi are ...

Chorionic villus sampling ... Because the placenta is derived from the extraembryonic portion of the early embryo, the villus cells in the placenta have the same genetic composition as the ...

Pro-inflammatory cytokines are modified during the multiplication of Trypanosoma cruzi within the placental chorionic villi and are associated with the level of infection via the signaling pathway ...