The fetal membranes consist of the chorion, amnion, yolk sac, and allantois. The chorion has three layers: cytotrophoblastic, chorionic connective tissue, and basement membrane. The chorion lies ...

In placental mammals, the chorion and the allantois together form the fetal side of the mature placenta. This is a chorioallantoic placenta. Chorion forms part of fetal tissue, allantois becomes ...

In its early life, the placenta is called a chorion because it is formed from the chorionic villi - finger-like growths which develop on the fertilised egg to help it implant in the wall of the ...

In placental mammals, the chorion and the allantois together form the fetal side of the mature placenta. This is a chorioallantoic placenta. Chorion forms part of fetal tissue, allantois becomes ...

This article is a review of the specific aspects of the fetal environment, including the cervix, uterus, placenta, chorion, amnion, amniotic fluid, and maternal aspects, and the potential meaning ...