The Predictive Power of Follicular Resistance Index (RI) And Peak Systolic Velocity (PSV) In Optimizing Conception Outcomes: A Quantitative Approach to Fertility Assessment

Background: Assisted reproductive techniques (ART) deals with complex aspects of fertility, with the help of advanced ultrasonography. If the follicular vascular indices are not in the defined range, it means that the follicle is not yet physiologically mature and, therefore, stimulation still needs to be continued. Objective: To determine effective follicular RI and PSV for conception in IUI cycles measured on two dimensional (2D), power and colour doppler ultrasound. Material and methods: This prospective study included 231 women undergoing IUI treatment. Written informed consent for participation in the study was obtained from each patient. Results: It was observed that majority patients conceived when their follicular RI was between 0.4 to 0.5 and PSV>10 had conceived during their cycles. Conclusion: RI < 0.5 and PSV > 10 are very pertinent parameters for assessing the ovarian flow, as they correlate well with oocyte recovery rates and thus they play a very pivotal role in determining the most appropriate time to administer hCG.