In the final multivariate model, abnormal TPO-antibodies and/or TG antibodies (OR 13.099, 95%CI 2.382-72.044; p= 0.003) and the presence unexplained infertility (OR 4.906, 95% CI 1.181-20.388; p= 0.029) were independently associated with an increased chance for ferritin levels <30μg/L. This evidence concerns the gene TPO and Infertility.