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Placental Pathophysiology in Maternal Psychoactive Substance Use: Biological, Clinical, and Forensic Perspectives
Oscar Fraile-Martinez1,2, Natalia Rubio-Bedoya1, Cielo García-Montero1,2
1Department of Medicine and Medical Specialities, (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcala de Henares, Spain.
Cells
|June 25, 2026
Summary
Maternal psychoactive substance use harms placental development and fetal health. Placental pathology aids in identifying prenatal exposure and improving maternal-fetal outcomes.
Area of Science:
- Reproductive Biology
- Toxicology
- Pathology
Background:
- Maternal psychoactive substance use poses significant risks to placental integrity and fetal development.
- The placenta, crucial for maternal-fetal exchange, is vulnerable to damage from substances like alcohol, tobacco, cannabis, cocaine, and opioids.
Purpose of the Study:
- To review the biological mechanisms, diagnostic methods, and forensic implications of placental pathology caused by psychoactive substance use.
- To synthesize evidence on how various substances affect placental function and lead to adverse pregnancy outcomes.
Main Methods:
- Literature review synthesizing current evidence on psychoactive substance-induced placental pathology.
- Summary of biological mechanisms, diagnostic approaches, and forensic relevance.
Main Results:
- Psychoactive substances disrupt placental vascularization, oxidative balance, epigenetic regulation, and cellular viability.
- Impaired nutrient/oxygen transfer increases risks of intrauterine growth restriction, preterm birth, congenital anomalies, and neurodevelopmental issues.
- Placental tissue analysis can identify prenatal drug exposure and reconstruct exposure timelines.
Conclusions:
- Placental examination offers objective evidence for suspected maternal substance use, with clinical and forensic value.
- Integrating placental pathology into prenatal care and research can improve maternal-fetal outcomes and inform public health strategies.
- This approach supports non-punitive, evidence-based interventions for substance use during pregnancy.
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