Transvaginal volumetry of first trimester gestational sac: A comparison of conventional with three-dimensional ultrasound
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Thomas Müller
Abstract
The aim of this study was to determine whether three-dimensional (3D) ultrasound is superior to two-dimensional (2D) ultrasound in evaluating first trimester gestational sac volume (GSV). 130 mainly low risk pregnancies between 5 and 12 weeks gestation were prospectively investigated. The 2D volumetry of GSV was performed using the ellipsoid formula; the 3D volumetry was carried out in all three planes using the contour mode and the volume from the measured circumferences and the distances between them were computed by a software. The data were analysed by variance and regression. The mean GSV increased from 1.5 ± 2 ml with 5 weeks to 127 ± 27 ml with 12 weeks (3D, longitudinal plane). The standard deviation of measured GSV increased with gestational age (GA) and GSV, and was more evident using 2D than 3D volumetry. GSV of pregnancies with similar GA differed considerably and viable pregnancies followed by miscarriage did not show different GSV. We conclude, that 3D volumetry of first trimester GSV is superior to 2D volumetry in its estimation, but seems to be without a prognostic significance for gestational outcome.
Copyright (c)2000 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Cesarean section for all twins?
- The effects of childbirth on the pelvic-floor
- Multiple courses of antenatal glucocorticoid treatment and fetal outcome
- Three-dimensional sonography in prenatal diagnosis: a luxury or a necessity?
- Does preeclampsia influence fetal lung maturity?
- Transvaginal volumetry of first trimester gestational sac: A comparison of conventional with three-dimensional ultrasound
- Effect of high amniotic fluid pressure on fetal circulation
- Bioelectrical impedance analysis in the clinical management of a pregnant woman undergoing dialysis
- Comparison of the relaxation effect in vitro of nitroglycerin vs. fenoterol on human myometrial strips
