Objectives: Polycystic ovary syndrome (PCOS) is considered as one of the causes of infertility. Anti-Mullerian hormone (AMH) is 2-3 times higher in patients with the PCOS compared to others. The present study aimed to survey the association between basal AMH levels and ovarian response in infertile PCOS patients.

Materials and Methods: In this cross-sectional study, 70 infertile PCOS women were enrolled referring to Milad Infertility Center (Mashhad, Iran) from May 2011 to April 2012. The basal blood level of AMH was evaluated. The patients received 5 mg of letrozole from the fifth cycle day (for 5 days) and then received 150 units of gonal F in the form of the recombinant follicle-stimulating hormone (FSH) on the ninth day of the cycle. Five thousand units of human chorionic gonadotropin (hCG) were prescribed for the patients who had one follicle of ≥ 18mm. Then, they should have had intercourse 36 hours later. After ovulation induction (OI) on the 10th cycle day, the second serum sample of AMH was taken.

Results: Changes of AMH did not have a significant relationship with the ovarian response, namely, it was lower in patients with positive ovarian response compared to those without any ovarian response. In addition, the basal level of AMH in patients with a positive response (3.91 ± 2.14) had no significant difference with the secondary AMH (3.27 ± 2.39) after the OI (P = 0.19).

Conclusions: Generally, the AMH was not a predictor of ovarian response in PCOS patients and the amount of AMH reduced after the treatment. This effect was maybe related to letrozole and gonadotropin.