Background: Women with polycystic ovary syndrome have significant difference in their ovarian stromal blood flow indices when compared to women with normal ovaries. The intra-ovarian blood flow is assessed by studying small arteries in the ovarian stroma not close to the surface of the ovary or near the wall of the follicles. Aim: To assess the value of changes in Doppler indices of ovarian stromal blood flow and hormonal profile in women with PCOS and previously described as being clomiphene citrate resistant in predicting the clinical outcome of laparoscopic ovarian drilling as regard ovulation. Study design: This study is interventional study.