OBJECTIVES: To evaluate the influence of female age on clomiphene citrate (CC) with IUI therapy and to compare the efficacy of this therapy between patients with ovulatory and anovulatory infertility. SETTING: A university fertility clinic. SUBJECTS: Six hundred sixty-four CC with IUI cycles from 290 women aged 22 to 48 years. MAIN OUTCOME MEASURES: Cumulative and clinical pregnancy rates (PRs). RESULTS: Both cumulative and clinical PRs declined substantially in women > 35 years when compared with those