Due to its innocuous character, ultrasonography is the method of choice in pregnancy monitoring. The combination of anatomical information provided by real time two-dimensional ultrasonography and physiological data obtained by color and spectral Doppler techniques makes ultrasonography a clinically powerful and important diagnostic instrument. Three-dimensional ultrasonography in power Doppler mode allows an accurate evaluation of vascular placental structures, also showing their spatial distribution.


Ultrasonography, Pregnancy monitoring, Real time two-dimensional ultrasonography, Color and spectral Doppler techniques, Three-dimensional ultrasonography in power Doppler.