Purpose of investigation: Ovarian reserve reflects the capacity of the ovaries for a successful pregnancy. Anti-Mullerian hormone (AMH) could be a useful marker to predict ovarian reserve and to adjust controlled ovarian stimulation. The aim of this study was to assess the relationship between AMH and intracytoplasmic sperm injection-in vitro fertilization (IVF-ICSI) outcome in poor responder women. Materials and Methods: This study was conducted prospectively for a period of 12 months. Inclusion criteria were FSH value >15 iu/l or antral follicle number <4, on the 2nd day of cycle. All patients underwent GnRH agonist stimulation with long protocol. Serum AMH levels were measured in the treatment cycle just before the stimulation. After the treatment, patients who were pregnant formed the study group and patients who were not pregnant formed the control group. Serum AMH level was the main outcome measure. Results: The study and control group consisted of 34 and 70 patients, respectively. No significant difference was found in duration of infertility, antral follicular count, basal E-2 and FSH levels. The mean serum AMH level was significantly higher in study group (p = 0.005). The retrieved oocyte number, metaphase 2 oocyte number, and fertilization rate were also significantly higher in the study group. Discussion: Evaluation of serum AMH seems to be a useful marker to predict IVF-ICSI outcome in poor responder patients.