Fig. 3
From: COVID-19 in pregnancy: placental pathological patterns and effect on perinatal outcome in five cases
Histological section showing chorioamnionitis with patches of neutrophil granulocytes in the context of connective tissue located below the amniotic epithelium (a Case 2, haematoxylin and eosin stain × 200); indecipherable umbilical arteritis on haematoxylin and eosin stain in the same case (b haematoxylin and eosin stain × 40), the same sections on immunohistochemical analysis showing positivity for CD15 in the amniotic membrane (c × 100) and in smooth muscle of one umbilical artery and Wharton’s jelly (d × 40)