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Assessment of early chorionic circulation by three-dimensional power Doppler
Tomislav Hafner1, Asim Kurjak, Biserka Funduk-Kurjak
1Department of Obstetrics and Gynecology, Medical School University of Zagreb, Sveti Duh Hospital, Zagreb, Croatia.
Journal of Perinatal Medicine
|April 6, 2002
Summary
Early pregnancy vascularization increases significantly. Three-dimensional power Doppler sonography revealed that chorionic vascularization index and vascularization flow index positively correlate with fetal growth during the first trimester.
Area of Science:
- Reproductive Medicine
- Medical Imaging
- Fetal Development
Background:
- Early placentation involves complex hemodynamic changes crucial for human development.
- Assessing early pregnancy vascularity is vital for understanding developmental processes.
Purpose of the Study:
- To investigate early placentation hemodynamics using 3D power Doppler.
- To quantify vascular changes in the chorion between 5 and 11 weeks of gestation.
Main Methods:
- Observational cross-sectional study of 25 patients (5-11 weeks gestation).
- Acquisition of 3D power Doppler volumes of the pregnant uterus.
- Isolation of chorionic signals for 3D vascular measurements (Vascularization Index - VI, Vascularization Flow Index - VFI).
Main Results:
- Chorion volume increased exponentially during the observation period.
- VI and VFI showed positive correlation with crown-rump length and chorion volume.
- Gradual increments in VI and VFI were observed throughout the 5-11 week gestational period.
Conclusions:
- 3D power Doppler sonography effectively assesses early placentation vascularity.
- Significant, gradual augmentation of intervillous blood flow occurs between 5 and 11 gestational weeks.
- Findings confirm dynamic vascular development in the early placenta.