{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T02:56:05Z","timestamp":1782528965237,"version":"3.54.5"},"reference-count":16,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2014,11,7]],"date-time":"2014-11-07T00:00:00Z","timestamp":1415318400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2015,1]]},"abstract":"Abstract<\/jats:title>Objective<\/jats:title>Investigate the rate of internal podalic version followed by breech extraction for a second non\u2010vertex twin with the first delivered vaginally, and compare neonatal outcome with emergency cesarean section.<\/jats:p><\/jats:sec>Design<\/jats:title>Cohort study.<\/jats:p><\/jats:sec>Setting<\/jats:title>National Danish Registers.<\/jats:p><\/jats:sec>Population<\/jats:title>Twin pregnancies (1997\u20132012) with gestational age \u226534\u00a0weeks; first twin delivered vaginally, second by internal podalic version and breech extraction or cesarean section.<\/jats:p><\/jats:sec>Methods<\/jats:title>Data were collected from the Danish National Patient Register and the Danish National Birth Register.<\/jats:p><\/jats:sec>Main outcome measures<\/jats:title>Rates of delivery mode, 5\u2010min Apgar score, asphyxia, umbilical cord pH<\/jats:styled-content>, admission to neonatal intensive care unit, treatment by mechanical ventilation, and experience level of obstetricians performing internal podalic version.<\/jats:p><\/jats:sec>Results<\/jats:title>457 births were available for analysis: 39 cases of internal podalic version and breech extraction and 418 cesarean section cases for second twin. Compared with the cesarean section group, the internal podalic version group had lower rates of asphyxia. Apgar scores and umbilical cord pH<\/jats:styled-content> levels were not significantly different, although with a tendency to be higher in the internal version than the cesarean section group, however, fewer cases needed mechanical ventilation. Thirty internal versions and breech extractions were performed by obstetricians with >5\u00a0years clinical experience and three by trainees.<\/jats:p><\/jats:sec>Conclusion<\/jats:title>Cesarean sections for a second twin seem to have been frequent during the last 15\u00a0years while internal podalic version is a vanishing procedure. A slight tendency for better neonatal outcome was found in the internal podalic version and extraction group than cesarean section.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.12521","type":"journal-article","created":{"date-parts":[[2014,10,6]],"date-time":"2014-10-06T08:01:50Z","timestamp":1412582510000},"page":"59-64","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Does internal podalic version of the non\u2010vertex second twin still have a place in obstetrics? A Danish national retrospective cohort study"],"prefix":"10.1111","volume":"94","author":[{"given":"Fjola","family":"Jonsdottir","sequence":"first","affiliation":[{"name":"Department of Gynecology and Obstetrics Roskilde University Hospital Roskilde Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lonny","family":"Henriksen","sequence":"additional","affiliation":[{"name":"The Research Unit Women's and Children's Health Rigshospitalet Copenhagen University Hospital Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Niels J.","family":"Secher","sequence":"additional","affiliation":[{"name":"The Research Unit Women's and Children's Health Rigshospitalet Copenhagen University Hospital Copenhagen Denmark"},{"name":"Department of Gynecology and Obstetrics Skejby University Hospital Aarhus Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nanna","family":"Maal\u00f8e","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics Hvidovre University Hospital Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,11,7]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa1214939"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e3181cd3380"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2010.02836.x"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e31822f0f8a"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1576\/toag.13.1.7.27635"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(95)91319-X"},{"key":"e_1_2_8_8_1","first-page":"160","article-title":"Intrapartum external version of the second twin","volume":"62","author":"Chervenak FA","year":"1983","journal-title":"Obstet Gynecol"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1186\/1741-7015-8-71"},{"key":"e_1_2_8_10_1","unstructured":"Danish Society of Obstetrics and Gynecology (DSOG).Tvillinger \u2013 h\u00e5ndtering af graviditet og f\u00f8dsel. [Twin pregnancy and birth](in Danish).Denmark 2010. Available online at:http:\/\/www.dsog.dk\/sandbjerg\/Sandbjerg%20%20%202010-09-04%20%20gemelliguideline.pdf(accessed 2 April 2014)."},{"key":"e_1_2_8_11_1","first-page":"3741","article-title":"The national patient registry. Evaluation of data quality","volume":"157","author":"Mosbech J","year":"1995","journal-title":"Ugeskr L\u00e6ger"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2011.05.033"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e3181c8b462"},{"key":"e_1_2_8_14_1","first-page":"617","article-title":"Internal version and breech extraction of the second twin. A series of 35 cases","volume":"25","author":"Dufour P","year":"1996","journal-title":"J Gynecol Obstet Biol Reprod (Paris)"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2393-14-55"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000260387.69720.5d"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0404.2011.01558.x"}],"container-title":["Acta Obstetricia et Gynecologica Scandinavica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Faogs.12521","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/aogs.12521","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,24]],"date-time":"2023-09-24T06:44:30Z","timestamp":1695537870000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/aogs.12521"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,11,7]]},"references-count":16,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2015,1]]}},"alternative-id":["10.1111\/aogs.12521"],"URL":"https:\/\/doi.org\/10.1111\/aogs.12521","archive":["Portico"],"relation":{},"ISSN":["0001-6349","1600-0412"],"issn-type":[{"value":"0001-6349","type":"print"},{"value":"1600-0412","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,11,7]]},"assertion":[{"value":"2014-04-27","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2014-09-29","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2014-11-07","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}