Gross Examination (general)

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Microscopic examination (general)

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Maternal Vascular Malperfusion

Placental Infarct
Placental Infarct
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Placental Infarct
Placental Infarct
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Decidual Arteriopathy - Hypertrophic Type
Decidual Arteriopathy - Hypertrophic Type
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Thin Umbilical Cord - <8mm
Thin Umbilical Cord - <8mm
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Increased Syncytial Knots
Increased Syncytial Knots

Fetal vascular malperfusion

Chorionic plate vessel with intramural fibrin deposition
Chorionic plate vessel with intramural fibrin deposition
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Chorionic plate vessel with intramural fibrin deposition and loose non-occlusive thrombus
Chorionic plate vessel with intramural fibrin deposition and loose non-occlusive thrombus
Stem villous vessel with intramural fibrin deposition
Stem villous vessel with intramural fibrin deposition
Stem villous vessel with intramural fibrin deposition
Stem villous vessel with intramural fibrin deposition
Avascular Villi
Avascular Villi
Avascular villi with villous stromal-vascular karyorrhexis
Avascular villi with villous stromal-vascular karyorrhexis
Avascular villi with villous stromal-vascular karyorrhexis
Avascular villi with villous stromal-vascular karyorrhexis
Avascular villi with villous stromal-vascular karyorrhexis
Avascular villi with villous stromal-vascular karyorrhexis
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From: https://pubmed.ncbi.nlm.nih.gov/30129125/

From: https://pubmed.ncbi.nlm.nih.gov/30129125/

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Chorioamnionitis

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Acute chorioamnionitis - bacterial organisms identified
Acute chorioamnionitis - bacterial organisms identified
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Table from: https://pubmed.ncbi.nlm.nih.gov/27223167/

Table from: https://pubmed.ncbi.nlm.nih.gov/27223167/
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Maternal Inflammatory Response - Stage 1
Maternal Inflammatory Response - Stage 1

Acute subchorionitis
Maternal Inflammatory Response - Stage 1
Maternal Inflammatory Response - Stage 1

Acute chorionitis - neutrophils within cellular chorion
Maternal Inflammatory Response - Stage 2
Maternal Inflammatory Response - Stage 2

Acute chorioamnionitis: neutrophils extend into fibrous chorion
Fetal Inflammatory Response - Stage 1
Fetal Inflammatory Response - Stage 1

Chorionic vasculitis - inflammation involves chorionic plate vessels

Miscellaneous

Meconium
Meconium
Meconium
Meconium
Villitis of unknown etiology
Villitis of unknown etiology
Villitis of unknown etiology
Villitis of unknown etiology
Villitis of unknown etiology
Villitis of unknown etiology
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Intravillous hemorrhage
Intravillous hemorrhage

Can be associated with placental abruption, umbilical cord occlusion, or difficult manual extraction
Vernix caseosa
Vernix caseosa
Vernix caseosa
Vernix caseosa
Basal Plate Myometrial Fibers
Basal Plate Myometrial Fibers
Basal Plate Myometrial Fibers
Basal Plate Myometrial Fibers
Basal Plate Myometrial Fibers
Basal Plate Myometrial Fibers
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