Browsing by Author "Cerdeira, S."
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- Reference ranges for uterine artery pulsatility index during the menstrual cycle: a cross-sectional studyPublication . Guedes-Martins, L.; Gaio, R.; Saraiva, J.; Cerdeira, S.; Matos, L.; Silva, E.; Macedo, F.; Almeida, H.Cyclic endometrial neoangiogenesis contributes to changes in local vascular patterns and is amenable to non-invasive assessment with Doppler sonography. We hypothesize that the uterine artery (UtA) impedance, measured by its pulsatility index (PI), exhibits a regular pattern during the normal menstrual cycle. Therefore, the main study objective was to derive normative new day-cycle-based reference ranges for the UtA-PI during the entire cycle from days 1 to 34 according to the isolated time effect and potential confounders such as age and parity.