Placenta

Chorioamnionitis

Villous tree branching from chorionic plate (right)

The chorionic plate (also called the fetal surface) is a thick layer of chorionic where the stem villi originate. Here the chorionic plate is also seem to be inflamed.

Neutrophils, lymphocytes and plasma cells

Pre eclampsia

Predominance of stem villi; majority of tertiary villi have syncytial knots

Congested stem villi

Fibrinous exudates

Calcification (blue)

Focal necrosis and fibrinous exudate

 Monochorionic diamniotic placenta

Section from the junction of two membranes; note two layers of amnion and no chorion in between