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The incidence of such abnormalities is increasing, but treatment options and preventive strategies are limited. Therefore, it is crucial to understand the etiology of placental abnormalities in location and anatomy. Placental formation already starts at implantation and therefore disorders during implantation may cause these abnormalities. Understanding of the normal placental structure and development is essential to comprehend the etiology of placental abnormalities in location and anatomy, to diagnose the affected women and to guide future research for treatment and preventive strategies. We reviewed the literature on the structure and development of the normal placenta and the placental development resulting in low\u2010lying placentas, placenta previa and abnormally invasive placentas.<\/jats:p>","DOI":"10.1111\/aogs.13834","type":"journal-article","created":{"date-parts":[[2020,2,28]],"date-time":"2020-02-28T14:58:06Z","timestamp":1582901886000},"page":"983-993","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":60,"title":["Development of placental abnormalities in location and anatomy"],"prefix":"10.1111","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2390-1245","authenticated-orcid":false,"given":"Charlotte H. J. 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