Ferritin is a key biomarker for iron stores in the body. Iron deficiency (low ferritin) can impair fertility by affecting ovulation and egg quality. Conversely, iron overload (high ferritin, e.g., in hemochromatosis) may also negatively impact fertility. However, ferritin alone is not a comprehensive fertility test; it should be interpreted alongside other parameters (hemoglobin, transferrin saturation, inflammatory markers) and a clinical evaluation. The evidence for ferritin's usefulness in fertility is based on clinical practice and observational studies, not strong RCTs. Caveat: A normal ferritin level does not rule out other fertility issues. For unresolved infertility, a thorough workup by a specialist is recommended.
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