The recent report on serum anti-Müllerian hormone (AMH) levels and phenotypes of polycystic ovary syndrome is very interesting [1]. Hwang et al. [1] concluded that "high serum AMH levels cannot predict the phenotype of polycystic ovary syndrome (PCOS) and metabolic disturbances in PCOS patients in the non-obese group". Notably, the results from this work are totally different from those of a recent report from Turkey [2]. Sahmay et al. [2] found that "AMH levels correlate best with polycystic ovarian morphology (PCOM)". In fact, the null relationship in the present report might be due to poor grouping and few subjects. The fact that the AMH is related to ovarian morphology should support the proposed correlation between AMH levels and PCOM phenotype [3].