Fig. 4

Liquefaction of decidua basalis via foam cells of Composite 2, a Centre of liquefaction (li) in the sub-mesometrial decidua surrounding the arteries (white arrows). si congested sinusoids, ul primary uterine lumen. Caspase 3 5x. b Inset: Caspase 3 positive foam cells (black arrows), arteries (white arrows).63x. For localization see Additional file 1: Detailed Observations, Slide 4