{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,11]],"date-time":"2026-10-11T12:12:04Z","timestamp":1791720724017,"version":"4.3.4"},"reference-count":59,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2024,6,14]],"date-time":"2024-06-14T00:00:00Z","timestamp":1718323200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2024,6,14]],"date-time":"2024-06-14T00:00:00Z","timestamp":1718323200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Australas J Ultrason Med"],"published-print":{"date-parts":[[2024,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction\/Purpose<\/jats:title>\n                    <jats:p>It is well\u2010documented in the literature that the placenta migrates during pregnancy; however, studies regarding placental cord insertion (PCI) migration are scarce. This longitudinal, prospective study aimed to determine whether PCI migration is a true phenomenon, to assess whether the PCI can change classification during pregnancy and to determine the validity of PCI site documentation including follow\u2010up of abnormal PCI.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Eighty\u2010three participants who had first, second and third trimester ultrasound examinations at a Western Australian private imaging practice over a 12\u2010month period between November 2021 and November 2022 were recruited. The measured distance of the lower margin of the placenta to the cervix, the distance of the PCI to the closest placental edge and the PCI classification were documented in each trimester. Data analysis was conducted to determine PCI migration rates during pregnancy and to test for association between PCI migration and maternal and placental factors.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The PCI migrated during pregnancy and the PCI classification has the potential to evolve. All identifiable PCIs that were normal in first trimester remained so throughout the pregnancy. The majority (67.6%) of cord insertions that were marginal in first trimester progressed to a normal insertion site by third trimester; 23.5% remained marginal and 8.8% evolved to a velamentous insertion. Three velamentous cord insertions were recorded in first trimester, none of which normalised\u2014two remained velamentous during the pregnancy and one evolved to marginal in second trimester. Marginal cord insertions (MCIs) \u226410\u2009mm from the placental edge in second trimester remained marginal in third trimester; MCIs that were &gt;15\u2009mm from the placental edge in second trimester normalised in third trimester.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Placental cord insertion migration is a phenomenon that occurs during pregnancy with the potential for PCI classification to evolve. Due to the association between abnormal PCI and perinatal complications, coupled with the potential for marginal cord insertion to evolve, documentation of PCI and follow\u2010up of abnormal PCI is beneficial, particularly in cases of velamentous insertion and marginal insertion at the placental edge or in the lower uterus.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ajum.12399","type":"journal-article","created":{"date-parts":[[2024,6,14]],"date-time":"2024-06-14T08:46:52Z","timestamp":1718354812000},"page":"200-209","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Placental cord insertion migration: Implications for ultrasound documentation and follow\u2010up of abnormal placental cord insertion site"],"prefix":"10.1002","volume":"27","author":[{"given":"Samantha","family":"Ward","sequence":"first","affiliation":[{"name":"Discipline of Medical Radiation Science, Curtin Medical School Curtin University  Perth Western Australia 6845 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhonghua","family":"Sun","sequence":"additional","affiliation":[{"name":"Discipline of Medical Radiation Science, Curtin Medical School Curtin University  Perth Western Australia 6845 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sharon","family":"Maresse","sequence":"additional","affiliation":[{"name":"Discipline of Medical Radiation Science, Curtin Medical School Curtin University  Perth Western Australia 6845 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,6,14]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.8487"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-0035-1557819"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1155\/2014\/341251"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1148\/rg.2017160155"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13643-017-0641-1"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1177\/1093526618758204"},{"key":"e_1_2_10_8_1","unstructured":"WeerakkodyY JonesJ.Variation in cord insertion.https:\/\/doi.org\/10.53347\/rID\u201013466 https:\/\/radiopaedia.org\/articles\/variation\u2010in\u2010cord\u2010insertion."},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0070380"},{"key":"e_1_2_10_10_1","volume-title":"Abnormal placental cord insertion in singleton pregnancies","author":"Dahlgren L","year":"2017"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.170.5.9574605"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/jum.15143"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/jum.15113"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.3109\/14767058.2014.918098"},{"key":"e_1_2_10_15_1","first-page":"20","article-title":"Living on the edge\u2026Velamentous cord insertion","volume":"1","author":"Ward S","year":"2013","journal-title":"Sound Effects"},{"key":"e_1_2_10_16_1","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2018.1453798"},{"key":"e_1_2_10_17_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13643-020-01355-0"},{"issue":"1","key":"e_1_2_10_18_1","first-page":"3","article-title":"Ultrasonographic evaluation of placental cord insertion at different gestational ages in low\u2010risk singleton pregnancies: a predictive algorithm","volume":"8","author":"Padula F","year":"2016","journal-title":"Facts Views Vis Obgyn"},{"key":"e_1_2_10_19_1","doi-asserted-by":"publisher","DOI":"10.1155\/2012\/308206"},{"key":"e_1_2_10_20_1","doi-asserted-by":"publisher","DOI":"10.1111\/aogs.12666"},{"key":"e_1_2_10_21_1","doi-asserted-by":"publisher","DOI":"10.1111\/aogs.13035"},{"key":"e_1_2_10_22_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.132"},{"key":"e_1_2_10_23_1","doi-asserted-by":"publisher","DOI":"10.1136\/bcr-2020-240245"},{"key":"e_1_2_10_24_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajogmf.2022.100812"},{"key":"e_1_2_10_25_1","doi-asserted-by":"publisher","DOI":"10.1177\/0300060520919249"},{"key":"e_1_2_10_26_1","doi-asserted-by":"publisher","DOI":"10.2350\/13-05-1337-OA.1"},{"key":"e_1_2_10_27_1","doi-asserted-by":"publisher","DOI":"10.7863\/jum.2006.25.8.963"},{"key":"e_1_2_10_28_1","doi-asserted-by":"publisher","DOI":"10.7863\/jum.2002.21.6.627"},{"key":"e_1_2_10_29_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.2839"},{"key":"e_1_2_10_30_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1447-0756.2011.01525.x"},{"key":"e_1_2_10_31_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2015.05.059"},{"key":"e_1_2_10_32_1","doi-asserted-by":"publisher","DOI":"10.1002\/ajum.12360"},{"key":"e_1_2_10_33_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11596-017-1745-5"},{"issue":"1","key":"e_1_2_10_34_1","first-page":"9","article-title":"Ultrasound assessment of placenta previa \u201cmigration\u201d in relationship to maternal demographic factors","volume":"16","author":"Predani\u0107 M","year":"2007","journal-title":"Gynaecol Perinatol"},{"key":"e_1_2_10_35_1","doi-asserted-by":"publisher","DOI":"10.7863\/jum.2005.24.6.773"},{"key":"e_1_2_10_36_1","doi-asserted-by":"publisher","DOI":"10.5144\/0256-4947.2000.382"},{"key":"e_1_2_10_37_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejogrb.2019.06.020"},{"key":"e_1_2_10_38_1","doi-asserted-by":"publisher","DOI":"10.7863\/jum.1996.15.8.585"},{"key":"e_1_2_10_39_1","doi-asserted-by":"publisher","DOI":"10.1002\/jum.15586"},{"key":"e_1_2_10_40_1","doi-asserted-by":"publisher","DOI":"10.3758\/BRM.41.4.1149"},{"issue":"10","key":"e_1_2_10_41_1","first-page":"696","article-title":"Localisations placentaires par \u00e9chographie [Placental localizations by B echography]","volume":"53","author":"Lefebvre JBA","year":"1972","journal-title":"J Radiol Electrol Med Nucl"},{"key":"e_1_2_10_42_1","doi-asserted-by":"publisher","DOI":"10.1148\/109.1.167"},{"key":"e_1_2_10_43_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1998.12060426.x"},{"key":"e_1_2_10_44_1","doi-asserted-by":"publisher","DOI":"10.1002\/jcu.22242"},{"key":"e_1_2_10_45_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejogrb.2012.08.021"},{"key":"e_1_2_10_46_1","doi-asserted-by":"publisher","DOI":"10.14740\/jocmr2310w"},{"key":"e_1_2_10_47_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10815-017-1084-2"},{"issue":"7","key":"e_1_2_10_48_1","first-page":"1722","article-title":"Assisted reproductive technique and abnormal cord insertion: a systematic review and meta\u2010analysis","volume":"10","author":"Matsuzaki S","year":"2022","journal-title":"Biomedicine"},{"key":"e_1_2_10_49_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1447-0756.2011.01555.x"},{"key":"e_1_2_10_50_1","doi-asserted-by":"publisher","DOI":"10.1111\/jog.12531"},{"key":"e_1_2_10_51_1","doi-asserted-by":"publisher","DOI":"10.1177\/875647902236841"},{"key":"e_1_2_10_52_1","doi-asserted-by":"publisher","DOI":"10.1111\/aogs.13834"},{"key":"e_1_2_10_53_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-23941-0"},{"key":"e_1_2_10_54_1","doi-asserted-by":"publisher","DOI":"10.1002\/jum.15163"},{"key":"e_1_2_10_55_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.24888"},{"key":"e_1_2_10_56_1","doi-asserted-by":"publisher","DOI":"10.1002\/jum.15477"},{"key":"e_1_2_10_57_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.27538"},{"key":"e_1_2_10_58_1","volume-title":"Guidelines for the performance of first trimester ultrasound","author":"ASUM Standards of Practice","year":"2021"},{"key":"e_1_2_10_59_1","volume-title":"Guidelines for the performance of second (mid) trimester ultrasound","author":"ASUM Standards of Practice","year":"2018"},{"key":"e_1_2_10_60_1","volume-title":"Guidelines for the performance of third trimester ultrasound","author":"ASUM Standards of Practice","year":"2014"}],"container-title":["Australasian Journal of Ultrasound in Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ajum.12399","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/ajum.12399","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ajum.12399","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T03:01:41Z","timestamp":1773370901000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/ajum.12399"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,6,14]]},"references-count":59,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2024,11]]}},"alternative-id":["10.1002\/ajum.12399"],"URL":"https:\/\/doi.org\/10.1002\/ajum.12399","archive":["Portico"],"relation":{},"ISSN":["1836-6864","2205-0140"],"issn-type":[{"value":"1836-6864","type":"print"},{"value":"2205-0140","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,6,14]]},"assertion":[{"value":"2024-06-14","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}