Article ID Journal Published Year Pages File Type
10032312 American Journal of Obstetrics and Gynecology 2005 6 Pages PDF
Abstract
Longitudinal cervical length changes differ significantly throughout gestation among singleton, twin, and triplet pregnancies. Cervical length measurements made in a standing position are comparable with those measured while supine, whereas cervical lengths measured during the Valsalva maneuver are significantly shorter than those made in either the supine or standing position.
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