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Table 2 Placental findings: case number, presence or absence of placental findings suggestive of SARS-CoV-2 are listed alongside the microbiology and immunohistochemistry results

From: Late miscarriage and stillbirth in asymptomatic and symptomatic hospitalised pregnant women in Belgium during the first and second waves of COVID-19: a prospective nationwide population-based study

Case

Histopathological examination

Microbiology and IHC

CHI

MPFD

or FD

TN

Other findings

# 1

Yes

Yes

No

/

SARS-CoV-2 PCR neg

Culture negative

# 2

No

Yes

Yes

MVM

Placental infarcts

Chorionitis

Vaginal SARS-CoV-2 PCR neg

# 3

No

No

No

Acute funisitis

Acute deciduitis

NA

# 4

Yes

Yes

No

IHC: CD3 + 

T-lymphocytes

CD68 + histiocytes

NA

# 5

No

Yes

No

Placental infarcts

NA

# 8

Yes

No

No

Placental atrophy

Focal infarct zone

SARS-CoV-2 PCR neg

# Twin1

Yes

Yes

Yes

MVM

70–80% infarction

IHC positive SARS-CoV-2 nucleocapsid

  1. Abbreviations: CHI Chronic histiocytic intervillositis, MPFD Massive perivillous fibrin deposition, FD Fibrin deposition, TN Trophoblast necrosis, MVM Maternal vascular malperfusion, NA Non applicable, PCR Polymerase chain reaction, IHC Immunohistochemistry, CD Cluster of differentiation, neg negative