This study was performed to confirm the favourable therapeutic effects of finasteride in hirsute women as described by previous publications of different research groups. Our study was a non-randomized, prospective clinical trial. Thirty five patients with hirsutism were included in the study. The patients received 5 mg finasteride orally once per day over a period of 12 months. Hirsutism score, FSH, LH, E-2, total T, free T, androstenedione (A), DHEAS, 17-hydroxyprogesterone (17-OHP) and sex hormone-binding globulin (SHBG) levels were determined in all the patients before treatment and every 6 months during treatment.