Placental Pathology and Pregnancy Outcomes

The placenta is a dynamic interface organ that regulates nutrient and gas exchange, hormone production and immunological protection for the developing fetus. Pathological alterations in placental structure or function can precipitate a spectrum of adverse pregnancy outcomes, including pre-eclampsia, fetal growth restriction, preterm birth and stillbirth. Lesions such as maternal vascular malperfusion, characterised by reduced maternal blood flow and ischaemic changes, often underpin hypertensive disorders of pregnancy and low birth weight. Fetal vascular malperfusion may lead to thrombotic events and infarctions, compromising fetal perfusion. Intrauterine infections such as chorioamnionitis elicit inflammatory cascades that can trigger premature labour and neonatal sepsis. Oxidative stress within the placental bed further disrupts trophoblast integrity and may amplify vascular dysfunction. Emerging research highlights how the burden and combination of specific lesion types correlate with neonatal morbidity, while new fields such as neuroplacentology explore the placenta’s role in long-term neurodevelopment. Understanding these pathologies has become crucial for risk stratification, early diagnosis and the development of targeted interventions to improve maternal and neonatal health globally.

Research from Nature Portfolio

Studies in malaria-endemic regions have revealed that placental malaria and histopathological lesions independently elevate the risk of pre-eclampsia, particularly among first-time mothers. Detailed examination of syncytial knot formation and intervillous inflammation demonstrated a three- to twelvefold increase in hypertensive complications when active or past infection was present. Multivariate analysis further established that primigravidity and specific histological markers in the placenta heighten susceptibility to pre-eclampsia, suggesting that regional variations in infectious exposure should inform tailored antenatal screening and management strategies.

Placental Pathology and Pregnancy Outcomes publication trend

The graph below shows the total number of articles in placental pathology and pregnancy outcomes across all publications each year (not limited to Nature Index journals).

Technical terms

Maternal vascular malperfusion: Impaired maternal blood flow to the placenta, resulting in ischaemic villous injury and infarction.

Chorioamnionitis: Inflammation and infection of the placental membranes, often causing preterm labour and neonatal infection.

Oxidative stress: Imbalance between reactive oxygen species production and antioxidant defences, leading to cellular damage.

Fetal growth restriction: Failure of the fetus to reach its genetically predetermined growth potential due to placental insufficiency or other factors.

References

1. Systemic Oxidative Stress in Severe Early-Onset Fetal Growth Restriction Associates with Concomitant Pre-Eclampsia, Not with Severity of Fetal Growth Restriction. Antioxidants (2023).
2. Association of Placental Pathology with Physical and Neuronal Development of Infants: A Narrative Review and Reclassification of the Literature by the Consensus Statement of the Amsterdam Placental Workshop Group. Nutrients (2024).
3. Histopathological lesions and exposure to Plasmodium falciparum infections in the placenta increases the risk of preeclampsia among pregnant women. Scientific Reports (2020).
4. Cumulative effect of maternal vascular malperfusion types in the placenta on adverse pregnancy outcomes. Placenta (2022).
5. What is known about neuroplacentology in fetal growth restriction and in preterm infants: A narrative review of literature. Frontiers in Endocrinology (2022).