<prompt> Regarding saline infusion sonography, all are true exceptBest performed within first 10 days of menstrual cycle.Timing of procedure is cycle dependent in all womenSIS in initial days of cycle, precludes disturbing a potential pregnancySIS is optimally done on cycle days, 4,5 or 6 because the lining is thinnest  <response>: For post-menopausal woman, timing of procedure is not cycle - dependent. 