الفهرس 
Physiology of normal corpus luteamOnly 14 pages are availabe for public view
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Abstract
Doppler ultrasound is a non invasive method for studying the flow velocity within a blood vessel111. Doppler signal analysis could be important in; detection of the presence or abscence of flow in a structure, estimation of absolute volume flow and quantitative description of time velocity wave forms and Doppler spectral content121.The theory and understanding of Doppler ultrasound require an analysis of two basic physical systems which includes; the Doppler shift phenomena and the vector analysis^31.