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Published on: January 29, 2018
Temporal progression of postmortem lividity: a systematic review and meta-analysis
Gokul G1, Avantika Mathur1, Swati Tyagi1
1Department of Forensic Medicine and Toxicology, All India Institute of Medical Sciences, New Delhi, India.
Forensic Science, Medicine, and Pathology
|July 25, 2026
Summary
Postmortem lividity (PML) timing is inconsistently defined. This review found significant variability in appearance, formation, and fixation, limiting its reliability for estimating time since death in forensic science.
Area of Science:
- Forensic Pathology
- Thanatology
- Forensic Science
Background:
- Postmortem lividity (PML) is crucial for estimating postmortem interval (PMI).
- Existing literature presents inconsistent timelines for PML progression.
- Reliability of PML for forensic estimations is questionable due to variability.
Purpose of the Study:
- To systematically review and synthesize evidence on PML timing.
- To evaluate the forensic reliability of PML appearance, complete formation, and fixation.
- To identify factors contributing to variability in PML progression.
Main Methods:
- Systematic review and meta-analysis following PRISMA guidelines.
- Literature search across five databases up to December 2025.
- Random-effects meta-analysis of data from 11 studies (n=1,789).
Main Results:
- Pooled mean times: 3.56h (appearance), 5.80h (formation), 10.33h (fixation).
- Extreme heterogeneity (I²=99.9%) observed across all PML stages.
- Variability linked to inconsistent definitions, methods, and confounding factors.
Conclusions:
- A general chronological sequence of PML exists but is highly variable.
- Substantial heterogeneity limits the reliability of fixed PML timelines for PMI.
- Standardized, objective methods are needed to improve the forensic utility of PML.
