HRT has been suggested to have neither a metabolic nor a direct vascular effect
on arterial tone. PI and RI are indicators of resistance to flow: the higher the value of these
indices, the greater the resistance to flow. The TVDS measurements of uterine blood flow in
postmenopausal women (pmw) show a mean uterine artery PI of 3.3+/-1.04 and a mean RI
of 0.93+/-0.1. The aim of our study was to determine whether HRT had any positive effect on
uterine arterial blood flow
