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The following topics will be reviewed: (1) the importance of evaluation of both fetal and placental tissue in first trimester abortions to confirm an intrauterine pregnancy versus an ectopic pregnancy; (2) the clinical history associated with an abortion specimen or retained products of conception (POC) influences how the pathologist should triage the specimen; (3) the criteria for diagnosis of a molar pregnancy, which is critical for clinicians to know which patients need follow-up; (4) the utility of genetic studies for both diagnosis and appropriate follow-up of the patient; and (5) the pathologic evaluation of specimens from patients with post-partum hemorrhage for placenta accreta spectrum and subinvolution of maternal vessels.<\/jats:p>","DOI":"10.1177\/10935266241255981","type":"journal-article","created":{"date-parts":[[2024,5,25]],"date-time":"2024-05-25T04:55:07Z","timestamp":1716612907000},"page":"499-512","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Triaging and Evaluation of Products of Conception in Abortions and Post-Partum Hemorrhage"],"prefix":"10.1177","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3822-0271","authenticated-orcid":false,"given":"Philip J.","family":"Katzman","sequence":"first","affiliation":[{"name":"University of Rochester Medical Center, Rochester, NY, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan L","family":"Hecht","sequence":"additional","affiliation":[{"name":"Beth Israel-Deaconess Medical Center, Boston, MA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2024,5,25]]},"reference":[{"key":"bibr1-10935266241255981","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-030-84725-8"},{"key":"bibr2-10935266241255981","volume-title":"Diagnostic Pathology: Placenta","author":"Heerema-McKenney A","year":"2019","edition":"2"},{"key":"bibr3-10935266241255981","unstructured":"Evaluation of the first trimester products of conception. 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