The aim of the study to evaluate the clinical value of the serum anti müllerian hormone (AMH) level in comparison with the serum cancer antigen 125 (CA125) level for diagnosing and determining the severity of endometriosis among infertile women. The sample of the study was 25 women undergoing laparoscopy for infertility. Endometriosis was diagnosed by direct visualization of implants by laparoscopy and classified into stages according to the Revised American Fertility Society (R-AFS) classification. Blood samples were drawn on cycle’s days 5-12 and stored for subsequent analysis of AMH and CA125 levels and the value obtained was correlated with the presence or absence of endometriosis and the severity of the disease. The findings of this study suggested the possibility of using serum AMH for predicting the severity of endometriosis among infertile women.