{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T00:27:50Z","timestamp":1788481670713,"version":"build-2803163510"},"reference-count":25,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,2,3]],"date-time":"2021-02-03T00:00:00Z","timestamp":1612310400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background: The purpose of this study was to evaluate the prevalence of velamentous cord insertion (VCI) and the actual association between pathologically confirmed VCI and perinatal outcomes in twins based on the chorionicity. Methods: All twin pregnancies that received prenatal care at a specialty clinic for multiple pregnancies, from less than 12 weeks of gestation until delivery in a single institution between 2015 and 2018 were included in this retrospective cohort study. Results: A total of 941 twins were included in the study. The prevalence of VCI in dichorionic (DC) twins and monochorionic diamniotic (MCDA) twins was 5.8% and 7.8%, respectively (p = 0.251). In all study population, the prevalence of vasa previa and placenta accreta spectrum was higher in VCI group than that of non-VCI group (p = 0.008 and 0.022). In MCDA twins with VCI, birth weight, 1 and 5-min Apgar score were lower than DC twins with VCI (p = 0.010, 0.002 and 0.000). There was no significant association between VCI and selective fetal growth restriction (p = 0.486), twin-to-twin transfusion syndrome (p = 0.400), and birth-weight discordance (&gt;20% and &gt;25%) (p = 0.378 and 0.161) in MCDA twins. Conclusion: There was no difference in the incidence of VCI in twins based on the chorionicity. Moreover, VCI was not a risk factor for adverse perinatal outcomes excepting vasa previa and placenta accreta spectrum, which had a high incidence in twins with VCI.<\/jats:p>","DOI":"10.3390\/jcm10040572","type":"journal-article","created":{"date-parts":[[2021,2,3]],"date-time":"2021-02-03T20:31:51Z","timestamp":1612384311000},"page":"572","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Clinical Significance of Velamentous Cord Insertion Prenatally Diagnosed in Twin Pregnancy"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9324-9240","authenticated-orcid":false,"given":"Hyun-Mi","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology, CHA Ilsan Medical Center, CHA University, Goyang 10414, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1129-6201","authenticated-orcid":false,"given":"SiWon","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Mount Sinai Medical Center, Miami Beach, FL 33109, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Min-Kyung","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul 03722, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"You Jung","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University, Seoul 06135, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Moon Young","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University, Seoul 06135, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hye Yeon","family":"Boo","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, CHA Ilsan Medical Center, CHA University, Goyang 10414, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5137-0680","authenticated-orcid":false,"given":"Jin Hoon","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1016\/j.ejogrb.2012.08.021","article-title":"Risk factors and adverse pregnancy outcomes among births affected by velamentous umbilical cord insertion: A retrospective population-based register study","volume":"165","author":"Raisanen","year":"2012","journal-title":"Eur. 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