Is FT4 useful for Fruchtbarkeit?

The question of whether FT4 (free thyroxine) is useful for fertility cannot be answered from the provided context. In general medical practice, thyroid function, including FT4, is relevant to fertility, as both hyper- and hypothyroidism can impair reproductive capacity. However, FT4 alone is not a sufficient marker; TSH and possibly TPO antibodies are also important. The provided context contains no specific studies or data supporting or refuting the utility of FT4 for fertility. Therefore, the evidence is unclear. Caveat: For fertility issues, comprehensive thyroid diagnostics by a physician are recommended, not a single marker. MyBody-X may offer thyroid parameters, but clinical interpretation requires professional guidance.