One study comparing Chinese and European women from the Netherlands, Belgium, Germany, France, and Turkey found that from the age of 25 years onward, Chinese women had significantly lower AMH than women of European origin.34This was confirmed in another study, where Chinese women had a lower AMH cut-off value for diagnosing PCOS compared with non-Asian women.35When comparing Caucasian women to Afro-Americans and Hispanic women, AMH levels were highest in Caucasian women. Here, AMH is linked to polycystic ovary syndrome.