We showed that the incidence of subclinical hypothyroidism in women of the 3rd AMH quartile was lower than those in other quartiles, even the 4th; this may partly be explained by the including of women with subclinical ovarian dysfunction in the 4th AMH quartile, who had higher AMH levels and regular menstrual cycles, but had polycystic morphology in sonography and subclinical anovulation [33, 34] and also higher rates of thyroid autoimmunity and hypothyroidism [35], despite our effort to recruit fertile women with regular menstrual cycles for the purpose of the present study. Here, AMH is linked to ovarian dysfunction.