What Are Fetal Membranes?
What Are Fetal Membranes? Developmentally, fetal membranes are composed of two separate layers of tissues (Figure 1); (1) a single cell epithelial layer of amnion that forms the innermost lining of the uterine cavity, bathed in amniotic fluid and in constant touch with the fetus, and (2) the outer chorion trophoblast layer that forms the