{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T10:48:02Z","timestamp":1779187682067,"version":"3.51.4"},"reference-count":19,"publisher":"Wiley","issue":"13","license":[{"start":{"date-parts":[[2021,8,30]],"date-time":"2021-08-30T00:00:00Z","timestamp":1630281600000},"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":["BJOG"],"published-print":{"date-parts":[[2021,12]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To assess whether delivery mode and duration of labour in a first labour of spontaneous onset is associated with gestational length, delivery mode and neonatal outcome in the subsequent pregnancy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study design<\/jats:title><jats:p>Retrospective analysis of prospectively collected data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>15 Maternity units in North West London (1988\u20132000).<\/jats:p><\/jats:sec><jats:sec><jats:title>Population<\/jats:title><jats:p>30\u2009840 women with spontaneous onset of labour in pregnancy 1 and a subsequent birth reported in the same database.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Assessment of outcomes by mode of delivery in pregnancy 1, restricting the analysis to the difference in the gestational length between pregnancy 1 and 2.<\/jats:p><\/jats:sec><jats:sec><jats:title>Main outcome measures<\/jats:title><jats:p>Gestational length, mode of delivery and neonatal unit admission in pregnancy 2.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Caesarean section (CS) in the first or second stage of labour in pregnancy 1 was associated with pregnancy 2 being a median of 5 and 8\u2009days shorter and a preterm birth rate of 6.0% and 10.1%, respectively, whereas following a normal or instrumental vaginal birth in pregnancy 1, the median duration was similar, with preterm delivery rates of 4.5% and 3.9%. In all, 56.2% of women with a CS in pregnancy 1 had a repeat CS and 12.5% of their babies were admitted to a neonatal unit, compared with 5.3% of women with vaginal birth. Longer labours were associated with shorter gestations in pregnancy 2.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Compared with vaginal birth, an emergency CS in the first\u2010term pregnancy is associated with a shorter gestational length, increased rate of repeat CS and increased risk of NNU admission in the next pregnancy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Tweetable abstract<\/jats:title><jats:p>An emergency caesarean section in the first\u2010term pregnancy affects the duration and outcome of the next pregnancy.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1471-0528.16864","type":"journal-article","created":{"date-parts":[[2021,8,16]],"date-time":"2021-08-16T08:10:21Z","timestamp":1629101421000},"page":"2132-2139","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["The effect of mode of delivery and duration of labour on subsequent pregnancy outcomes: a retrospective cohort study"],"prefix":"10.1111","volume":"128","author":[{"given":"KD","family":"Van Winsen","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynaecology Chelsea and Westminster Hospital London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"MD","family":"Savvidou","sequence":"additional","affiliation":[{"name":"Academic Department of Obstetrics and Gynaecology Department of Metabolism, Digestion and Reproduction Imperial College London Chelsea &amp; Westminster Hospital London UK"},{"name":"Fetal Medicine Unit Chelsea &amp; Westminster Hospital London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"PJ","family":"Steer","sequence":"additional","affiliation":[{"name":"Academic Department of Obstetrics and Gynaecology Department of Metabolism, Digestion and Reproduction Imperial College London Chelsea &amp; Westminster Hospital London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,8,30]]},"reference":[{"issue":"2","key":"e_1_2_7_2_1","article-title":"Overview. 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