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The present study aims to compare gender-based postmortem changes and investigates the role of collagen fibers as a potential indicator of PMI in albino rats. Eighteen male and nine female adult albino rats were examined. Three prostates, three uterine horns, and the quadriceps muscle of the hind limb of each animal were collected at six time points (0, 6, 24, 36, 48, and 144\u2005h postmortem) after scarifying rats by neck dislocation. Morphological analysis revealed progressive softening of the organs with darker discoloration with increasing PMI. Histological examination using hematoxylin and eosin staining showed cellular degradation up to 48\u2005h PM. Masson's trichrome staining highlighted the persistence of collagen fibers up to 144\u2005h. Notably, male prostates exhibited greater resistance to postmortem degradation compared to female uteri, suggesting that potential sex identification by gonads is possible up to 48\u2005h PM.<\/jats:p>","DOI":"10.1177\/00258024251348721","type":"journal-article","created":{"date-parts":[[2025,6,16]],"date-time":"2025-06-16T04:23:53Z","timestamp":1750047833000},"page":"42-51","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Collagen fibers as an indicator of postmortem interval in non-gravid uterus, prostate, and skeletal muscles of adult albino rats"],"prefix":"10.1177","volume":"66","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4607-7586","authenticated-orcid":false,"given":"Nermin Nabil","family":"Fayed","sequence":"first","affiliation":[{"name":"Forensic Medicine and Clinical Toxicology Department, Cairo University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7346-0268","authenticated-orcid":false,"given":"Nadia A","family":"Kotb","sequence":"additional","affiliation":[{"name":"Forensic Medicine and Clinical Toxicology Department, Cairo University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9040-584X","authenticated-orcid":false,"given":"Samaa Samir","family":"Kamar","sequence":"additional","affiliation":[{"name":"Histology Department, Faculty of Medicine, Cairo University, Cairo, Egypt"},{"name":"Armed Forces College of Medicine"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3771-2485","authenticated-orcid":false,"given":"Doaa","family":"Tawfik","sequence":"additional","affiliation":[{"name":"Forensic Medicine and Clinical Toxicology Department, Cairo University"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,6,16]]},"reference":[{"key":"e_1_3_4_2_2","doi-asserted-by":"publisher","DOI":"10.1201\/b19276"},{"key":"e_1_3_4_3_2","first-page":"1","article-title":"Potential use of GAPDH m-RNA in estimating PMI in brain tissue of albino rats at different environmental conditions","volume":"7","author":"Elghamry HA","year":"2017","unstructured":"Elghamry HA, Mohamed MI, Hassan FM, et al. Potential use of GAPDH m-RNA in estimating PMI in brain tissue of albino rats at different environmental conditions. Egypt J Forensic Sci [Internet] 2017; 7: 1\u20137. https:\/\/ejfs.springeropen.com\/articles\/10.1186\/s41935-017-0024-8 (accessed 9 June 2023).","journal-title":"Egypt J Forensic Sci [Internet]"},{"key":"e_1_3_4_4_2","unstructured":"Shedge R Krishan K Warrier V et al. Postmortem Changes. 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