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Maternal and paternal history of breech increase risk equally
| The first 150 words of the full text of this article appear below. |
Much attention has been focused on the consequences of breech presentation and on strategies to minimise risk for both the fetus and the mother. Studies, including the landmark term breech trial, have had a positive effect on clinical practice and set a standard in developed countries of caesarean delivery for persisting breech presentation.1 2 3 Less attention, however, has been focused on why some fetuses deliver in breech position. In the accompanying paper, Nordtveit and colleagues investigate whether the risk of breech delivery can be passed on through generations via both men and women.4
The prevalence of breech presentation decreases through gestation as fetuses mature, and most fetuses move into cephalic position before delivery. The prevalence of breech presentation is 25% at 28 weeks gestation and 3-4% at term.5 Risk factors include maternal characteristics (primiparity, contracted pelvis, high maternal age, and uterine abnormality); characteristics of the pregnancy (multifetal gestation and placental implantation
Janet R Hardy, assistant professor of medicine, obstetrics/gynecology, and pediatrics
1 Department of Medicine; Division of Preventive and Behavorial Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA
janet.hardy@umassmed.edu