{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,9,1]],"date-time":"2023-09-01T13:50:30Z","timestamp":1693576230662},"reference-count":75,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2012,2,21]],"date-time":"2012-02-21T00:00:00Z","timestamp":1329782400000},"content-version":"unspecified","delay-in-days":1665,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Twin Res Hum Genet"],"published-print":{"date-parts":[[2007,8,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The aim was to study the effect of twin gestations in a uterus with 2 bodies on the probability of breech presentation at delivery. The hypothesis was that the probability of breech presentation was not higher than 50%. A review was undertaken of MEDLINE (1966\u20132004) and of the article reference list for statistical analysis of presentation at delivery among twins in a normal uterus, singleton gestations in a uterus with 2 bodies, and case studies of twins in a uterus with 2 bodies. There are 10 studies of twin gestations in a normal uterus (Twin A 3036 cases, breech presentation 22.36%; Twin B 2758 cases, breech presentation 36.87%), 2 studies of singleton gestations in a uterus with 2 bodies (297 cases, breech presentation 42.09%), and 57 case report studies of twin gestations in a uterus with 2 bodies (Twin A 56 cases, breech presentation 14.29%; Twin B 54 cases, breech presentation 18.52%). The odds ratio and chi-square test for differences in probabilities show a significantly lower incidence of breech presentation for twins in a uterus with 2 bodies compared with twins in a normal uterus (Twin A, odds ratio = 0.58; \u03c7<jats:sup>2<\/jats:sup> = 2.08, <jats:italic>p<\/jats:italic> &gt; .05, Twin B, odds ratio = 0.39, \u03c7<jats:sup>2<\/jats:sup> = 7.67, <jats:italic>p<\/jats:italic> &lt; .05), and singleton gestations in a uterus with 2 bodies (Twin A, odds ratio = 0.23, \u03c7<jats:sup>2<\/jats:sup> = 15.51, <jats:italic>p<\/jats:italic> &lt; .05; Twin B, odds ratio = 0.31, \u03c7<jats:sup>2<\/jats:sup> = 10.72, <jats:italic>p<\/jats:italic> &lt; .05). Twin gestations in a uterus with 2 bodies decrease the probability of breech presentation.<\/jats:p>","DOI":"10.1375\/twin.10.4.649","type":"journal-article","created":{"date-parts":[[2007,8,20]],"date-time":"2007-08-20T12:11:27Z","timestamp":1187611887000},"page":"649-654","source":"Crossref","is-referenced-by-count":2,"title":["Does a Probability of Breech Presentation of More Than 50% Exist Among Diseases and Medical Conditions?"],"prefix":"10.1017","volume":"10","author":[{"given":"Slobodan R.","family":"Sekuli\u0107","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u0110orde S.","family":"Petrovi\u0107","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Radmila","family":"Runi\u0107","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark","family":"Williams","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tihomir R.","family":"Vejnovi\u0107","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2012,2,21]]},"reference":[{"key":"p_1_197","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1093\/oxfordjournals.humrep.a137860","volume":"8","author":"Acien P.","year":"1993","journal-title":"Human Reproduction"},{"key":"p_2_198","first-page":"135","volume":"81","author":"Agarwal A. 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