{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T07:58:38Z","timestamp":1780387118155,"version":"3.54.1"},"reference-count":22,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2012,3,20]],"date-time":"2012-03-20T00:00:00Z","timestamp":1332201600000},"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":[[2012,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:italic>Objective.<\/jats:italic> To assess morbidity and mortality in twin pregnancy deliveries, according to chorionicity and mode of delivery. <jats:italic>Design.<\/jats:italic> Population\u2010based retrospective cohort. <jats:italic>Setting.<\/jats:italic> Fourteen obstetric departments in Denmark. <jats:italic>Population.<\/jats:italic> One thousand one hundred and seventy\u2010five twin pregnancies with two live fetuses at 36<jats:sup>+0<\/jats:sup> weeks of gestation. <jats:italic>Methods.<\/jats:italic> Pregnancy outcomes assessed according to chorionicity and mode of delivery. <jats:italic>Main outcome measures.<\/jats:italic> Poor outcome defined as five min Apgar score \u2264 7, umbilical artery pH &lt; 7.10, admission to neonatal unit for more than three days or death. <jats:italic>Results.<\/jats:italic> Dichorionic (DC) twins, delivered after 36 gestational weeks, with intended vaginal delivery (<jats:italic>n<\/jats:italic>= 689) compared with DC twins with planned cesarean section (<jats:italic>n<\/jats:italic>= 371) had an increased risk of poor outcome [odds ratio (OR) 1.47, <jats:italic>p<\/jats:italic>= 0.037] after adjustment for body mass index, parity and weight discordance. There was no increased risk for poor outcome in monochorionic (MC) twins with intended vaginal delivery (<jats:italic>n<\/jats:italic>= 63) compared with planned cesarean section (<jats:italic>n<\/jats:italic>= 52; OR 0.87, 95% confidence interval 0.26\u20132.96). Nulliparity increased the risk of poor outcome in DC (OR 1.5, <jats:italic>p<\/jats:italic>= 0.03) and in MC twins (OR 4.01, <jats:italic>p<\/jats:italic>= 0.02), as well as birthweight discordance &gt;300 g (DC, OR 1.50, <jats:italic>p<\/jats:italic>= 0.02; and MC, OR 6.02, <jats:italic>p<\/jats:italic>= 0.002). For DC twins, we found a significantly higher risk of poor outcome of the second\u2010born twin compared with the first (OR 1.64, <jats:italic>p<\/jats:italic>= 0.001). <jats:italic>Conclusions.<\/jats:italic> Dichorionic twins born after 36 weeks of gestation had a higher risk of poor outcome by intended vaginal delivery than by planned cesarean section. For MC twins, statistical differences in outcome by mode of delivery could not be seen.<\/jats:p>","DOI":"10.1111\/j.1600-0412.2011.01356.x","type":"journal-article","created":{"date-parts":[[2012,3,21]],"date-time":"2012-03-21T15:41:52Z","timestamp":1332344512000},"page":"463-469","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":60,"title":["Twin births: cesarean section or vaginal 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