{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T00:13:26Z","timestamp":1759882406509,"version":"build-2065373602"},"reference-count":17,"publisher":"Cambridge University Press (CUP)","issue":"5","license":[{"start":{"date-parts":[[2024,3,27]],"date-time":"2024-03-27T00:00:00Z","timestamp":1711497600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Biosoc. Sci."],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Assisted reproductive technologies (ARTs) such as in vitro fertilisation (IVF) and intracytoplasmic sperm injection (ICSI) are still discussed critically, as there is no consensus on whether these treatments could be the cause of risk factors for obstetric problems such as breech presentation. The aim of this study was to test the association between ART and breech presentation among 11920 singleton term births taking place in Vienna from 2010 to 2020. In this single-centre medical record-based study, data concerning the conception mode (spontaneous versus IVF or ICSI), child presentation, birth mode, newborn sex and size as well as age, height, weight, and reproductive history of the mother were included. Three hundred twenty-six newborns (2.7%) were conceived by IVF or ICSI, and 527 newborns (4.4%) were delivered in breech presentation. Breech presentation occurred in 7.6% of IVF\/ICSI children but only in 4.3% of spontaneously conceived children (<jats:italic>P<\/jats:italic> = 0.019). ART increased the crude risk of breech presentation significantly (OR = 1.67; 95% CI 1.71 \u2013 2.38). After adjusting for maternal age, height, number of previous births, smoking, and newborn sex, however, ART had no longer a significant impact on the risk of breech presentation. In contrast, breech presentation was significantly associated with higher maternal age as well as a lower number of previous births, but not with ART. This study shows that the adverse outcomes of IVF and ICSI pregnancies may not be due to the ART treatment alone but might also be due to the mostly higher age and lower parity of the mothers using ART.<\/jats:p>","DOI":"10.1017\/s0021932024000130","type":"journal-article","created":{"date-parts":[[2024,3,27]],"date-time":"2024-03-27T03:44:35Z","timestamp":1711511075000},"page":"920-924","source":"Crossref","is-referenced-by-count":0,"title":["Assisted reproductive technology (ART) is not an independent risk factor for breech presentation among singleton term births in Vienna, Austria"],"prefix":"10.1017","volume":"56","author":[{"given":"L.","family":"Bartsch","sequence":"first","affiliation":[{"name":"University of Vienna"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"H\u00e4mmerle","sequence":"additional","affiliation":[{"name":"University of Vienna"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Putsch\u00f6gl","sequence":"additional","affiliation":[{"name":"University of Vienna"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B.","family":"Hartmann","sequence":"additional","affiliation":[{"name":"Clinic Donaustadt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3220-7271","authenticated-orcid":false,"given":"S.","family":"Kirchengast","sequence":"additional","affiliation":[{"name":"University of Vienna"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2024,3,27]]},"reference":[{"key":"S0021932024000130_ref6","doi-asserted-by":"crossref","first-page":"1144","DOI":"10.3390\/jpm13071144","article-title":"Assisted reproductive technology and breech delivery: a nationwide cohort study in singleton 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mode of conception and infertility treatment on fetal growth and prematurity","volume":"29","author":"Valenzuela-Alcaraz","year":"2016","journal-title":"The Journal of Maternal-Fetal and Neonatal Medicine"},{"key":"S0021932024000130_ref9","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1093\/humupd\/dms018","article-title":"Obstetric and perinatal outcomes in singleton pregnancies resulting from IVF\/ICSI: a systematic review and meta-analysis","volume":"18","author":"Pandey","year":"2012","journal-title":"Human Reproduction Update"},{"key":"S0021932024000130_ref3","doi-asserted-by":"crossref","first-page":"434","DOI":"10.1111\/ajo.13663","article-title":"The impact of assisted reproductive technology and ovulation induction on breech presentation: a whole of population-based cohort study","volume":"63","author":"Chen","year":"2023","journal-title":"Australian New Zealand Journal of Obstetrics and Gynaecology"},{"key":"S0021932024000130_ref7","doi-asserted-by":"crossref","first-page":"1110","DOI":"10.1016\/j.fertnstert.2014.06.034","article-title":"Perinatal outcomes in 6,338 singletons born after intrauterine insemination in Denmark, 2007 to 2012: the influence of ovarian stimulation","volume":"102","author":"Malchau","year":"2014","journal-title":"Fertility and Sterility"},{"key":"S0021932024000130_ref17","doi-asserted-by":"crossref","first-page":"216","DOI":"10.1023\/A:1024103427374","article-title":"Dilemma of increased obstetric risk in pregnancies following IVF-ET","volume":"20","author":"Z\u00e1dori","year":"2003","journal-title":"Journal of Assisted Reproduction and Genetics"},{"key":"S0021932024000130_ref1","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1093\/humupd\/dmz001","article-title":"The health of children conceived by ART: \u201cThe chicken or the egg?\u201d","volume":"25","author":"Berntsen","year":"2019","journal-title":"Human Reproduction 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