Evidence check: Eisen-Ferritin Selbsttest in the context of fertility

The iron-ferritin self-test measures ferritin levels as a proxy for body iron stores. Adequate iron status is relevant for fertility: iron deficiency can impair ovulation and egg quality, while iron overload (hemochromatosis) increases oxidative stress and may reduce sperm quality. However, evidence for self-tests is limited: most studies use venous blood draws in clinical labs, not capillary finger-stick tests. Accuracy of home tests varies by device and user technique. Additionally, ferritin is an acute-phase reactant – inflammation or infection can falsely elevate levels. Without concurrent inflammatory markers (e.g., CRP), interpretation is unreliable. A self-test may serve as a rough screening tool but does not replace professional diagnostics. For fertility, I recommend laboratory measurement of ferritin, serum iron, and transferrin saturation, interpreted by a gynecologist or endocrinologist. Evidence grade: human-moderate for the iron–fertility link, but marketing/unclear for the self-test as a standalone diagnostic.