| pubmed-article:12662166 | pubmed:abstractText | During the physiological course of pregnancy maternal peripheral vascular resistance decreases. Using the Doppler technique, the decreasing resistance and disappearance of the early diastolic notch in the arterial uterine perfusion can be observed. These changes in the Doppler flow velocity wave form are caused by the trophoblast invasion in which the spiral arteries loose their musculoelastic structure of the arterial wall. The aim of this study was to investigate whether maternal systemic alteration in the Doppler flow velocity waveform and Pulsatility Index (PI) could be monitored at the cubital artery during normal pregnancy. | lld:pubmed |
