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Does a Probability of Breech Presentation of More Than 50% Exist Among Diseases and Medical Conditions?

Published online by Cambridge University Press:  21 February 2012

Slobodan R. Sekulić ,
Đorde S. Petrović ,
Radmila Runić ,
Mark Williams  and
Tihomir R. Vejnović
Slobodan R. Sekulić*
Affiliation:
Department of Neurology, Clinical Center of Vojvodina, Novi Sad, Serbia. [email protected] OR [email protected]
Đorde S. Petrović
Affiliation:
Department of Obstetrics and Gynecology, Clinical Center, Novi Sad, Serbia.
Radmila Runić
Affiliation:
Department of Obstetrics and Gynecology, Harbor/UCLA, Torrance, California, United States of America.
Mark Williams
Affiliation:
Department of Pathology, Montefiore Medical Center, the Bronx, New York, United States of America.
Tihomir R. Vejnović
Affiliation:
Department of Obstetrics and Gynecology, Clinical Center, Novi Sad, Serbia.
*
*Address for correspondence: Slobodan R. Sekulić, Department of Neurology, Clinical Center of Vojvodina, Hajduk Veljkova 1–7, 21000 Novi Sad, Serbia.

Abstract

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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 (1966–2004) 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; χ2 = 2.08, p > .05, Twin B, odds ratio = 0.39, χ2 = 7.67, p < .05), and singleton gestations in a uterus with 2 bodies (Twin A, odds ratio = 0.23, χ2 = 15.51, p < .05; Twin B, odds ratio = 0.31, χ2 = 10.72, p < .05). Twin gestations in a uterus with 2 bodies decrease the probability of breech presentation.

Type
Articles
Information
Twin Research and Human Genetics , Volume 10 , Issue 4 , 01 August 2007 , pp. 649 - 654
Copyright
Copyright © Cambridge University Press 2007