Laurin S, Hegedüs V, Zurbriggen S
Acta Radiol Diagn (Stockh). 1976 Nov;17(6):856-60. doi: 10.1177/028418517601700613.
Pelvic measurements in a group of 115 women delivering in breech presentation were compared with those in a group of 100 delivering in cephalic presentation. The average pelvic measurements were all a few mm larger in the breech cases and the average sum of the outlet diameters was significantly larger. Pelvic disproportion was not more common in breech presentation and no support was found for the theory that large pelvic measurements predispose to breech presentation. The small differences found are attributed to the moulding of the pelvis occurring during parturition.
对115例臀位分娩女性的骨盆测量值与100例头位分娩女性的骨盆测量值进行了比较。臀位分娩病例的平均骨盆测量值均比头位分娩病例大几毫米，出口径总和的平均值明显更大。臀位分娩时骨盆不称并不更常见，也未找到证据支持骨盆测量值大易导致臀位分娩这一理论。所发现的微小差异归因于分娩过程中发生的骨盆塑形。
