{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T02:56:19Z","timestamp":1782528979531,"version":"3.54.5"},"reference-count":41,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,7,23]],"date-time":"2023-07-23T00:00:00Z","timestamp":1690070400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["72274100"],"award-info":[{"award-number":["72274100"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Birth"],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To compare the maternal and neonatal outcomes of twin pregnancies between vertex and nonvertex presentations of the second twin in vaginal delivery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this unicentric retrospective cohort study, we collected data from 213 cases of vaginal twin deliveries from January 2016 to July 2020. Participants were divided into the vertex\u2010vertex presentation group (VV) and vertex\u2010breech presentation group (VB). Data on maternal and neonatal outcomes were compared between groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among the 213 mothers and 426 infants (213 twin pairs), there were 140 women in the VV group and 73 women in the VB group (65.73% vs. 34.27%). Infants in the VB group had a higher incidence of admission to NICU (51.43% vs. 68.49%, <jats:italic>p<\/jats:italic>\u2009=\u20090.017), lower 1\u2010min (11.43% vs. 28.77%, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and 5\u2010minute Apgar scores (1.43% vs. 4.11%, <jats:italic>p<\/jats:italic>\u2009=\u20090.043) for the second twin. However, after the adjustment for sex of the twin, birth weight, chorionicity, and gestational age, the greater risk of admission to NICU and low 5\u2010min Apgar score was no longer significantly different.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>VB twins are at no greater overall risk of a poor outcome due to breech presentation in the second twin. However, the presentation of the second fetus represents a risk factor for a low 1\u2010min Apgar score. Obstetricians and midwives should consider appropriate interventions for second twins who present breech versus vertex.<\/jats:p><\/jats:sec>","DOI":"10.1111\/birt.12737","type":"journal-article","created":{"date-parts":[[2023,7,24]],"date-time":"2023-07-24T00:39:24Z","timestamp":1690159164000},"page":"978-987","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Outcomes of vertex\u2010vertex vs. vertex\u2010breech presentation in twin pregnancy after vaginal delivery in China"],"prefix":"10.1111","volume":"50","author":[{"given":"Huahua","family":"Liu","sequence":"first","affiliation":[{"name":"Affiliated Maternity and Child Health Care Hospital of Nantong University  Nantong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6135-2251","authenticated-orcid":false,"given":"Shuhan","family":"Yan","sequence":"additional","affiliation":[{"name":"Medical College of Nantong University  Nantong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fan","family":"Wu","sequence":"additional","affiliation":[{"name":"Medical College of Nantong University  Nantong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ting","family":"Bai","sequence":"additional","affiliation":[{"name":"Medical College of Nantong University  Nantong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4798-5145","authenticated-orcid":false,"given":"Feng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Medical College of Nantong University  Nantong China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,7,23]]},"reference":[{"issue":"17","key":"e_1_2_8_2_1","first-page":"1","article-title":"Births: final data for 2020","volume":"70","author":"Osterman M","year":"2021","journal-title":"Natl Vital Stat Rep"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2015.08.017"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2393-14-55"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000001128"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2017.03.009"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-018-1815-0"},{"issue":"128","key":"e_1_2_8_8_1","first-page":"926","article-title":"Multifetal Gestations: twin, triplet, and higher\u2010order multifetal pregnancies. 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