What to watch with Ferritin and fertility?

Ferritin is a storage protein for iron and a key biomarker of the body's iron status. Low ferritin levels indicate iron deficiency, which has been linked to fatigue, impaired cognitive function, and potential fertility issues. Iron deficiency can disrupt menstrual cycles, reduce egg quality, and increase the risk of anovulation. However, the evidence is not conclusive: while some studies suggest an association between low ferritin and reduced fertility, large randomized controlled trials are lacking. Conversely, high ferritin (iron overload, e.g., in hemochromatosis) can also impair fertility. Ferritin should always be interpreted alongside other iron markers (transferrin, hemoglobin) and under medical guidance. Self-testing without professional interpretation can be misleading. In summary, ferritin is a relevant but not standalone marker for fertility; maintaining adequate iron stores is important, but supplementation without confirmed deficiency is not recommended.