Volume and vascularity of the yolk sac studied by three-dimensional ultrasound and color Doppler
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S. Kupesic
Abstract
The aim of our study was to assess the volume of the gestational sac and yolk sac throughout the first trimester of pregnancy, and to establish the relationship between the yolk sac volume measurements and vascularity visualization rates.
Eighty women with uncomplicated singleton pregnancies between 5 and 12 weeks were evaluated by three-dimensional and color Doppler ultrasound (Combison 530, Kretztechnik).
Regression analysis revealed exponential rise of the gestational sac volume with gestational age throughout the first trimester. An exponential rise of the yolk sac volume was noticed between gestational weeks 5 and 8, followed by gradual increase of the yolk sac volume between the gestational weeks 8 and 10. After reaching the plateau from 10 to 11 weeks, yolk sac volume started to decrease. The highest visualization rates for the yolk sac vessels were obtained between gestational weeks 7 and 8. When yolk sac reached the maximum size between 10 and 11 weeks, reduced vascularity was demonstrated.
Three-dimensional ultrasound allowed estimation of the gestational sac and yolk sac volumes throughout the first trimester of pregnancy. Both of these measurements seem to be useful prognostic parameters for the pregnancy outcome. The combination of functional and volumetric data provides much useful information on early human development.
Copyright © 1999 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Venous Doppler velocimetry in relationship to central venous pressure and heart rate during hypoxia in the ovine fetus
- Volume and vascularity of the yolk sac studied by three-dimensional ultrasound and color Doppler
- Three-dimensional transvaginal ultrasound improves measurement of nuchal translucency
- Is the liver of the fetus the 4th preferential organ for arterial blood supply besides brain, heart, and adrenal glands?
- Postnatal change of renal artery blood flow velocity and its relationship with urine volume in very low birth weight infants during the first month of life
- Late hyporegenerative anemia in neonates with rhesus hemolytic disease
- Neonatal screening for congenital cytomegalovirus infections
- Familial perinatal hemochromatosis: A disease that causes recurrent non-immune hydrops
- A case of large placental chorioangioma with non-immunological hydrops fetalis
- Massive fetomaternal hemorrhage: How long should children with good evolution be controlled? A case report
- Congenital neonatal myotonic dystrophy with persistent pulmonary hypertension and coma: a difficult diagnosis
