What role does FT4 play in Fruchtbarkeit?

FT4 (free thyroxine) is a key thyroid hormone that regulates metabolism and indirectly influences fertility. Thyroid dysfunction (hypo- or hyperthyroidism) can disrupt menstrual cycles, ovulation, and sperm quality. However, the provided context contains no specific studies or data on the direct role of FT4 in fertility. The evidence level is therefore classified as unclear, as no validated sources from the given material can be cited. In general, a normal FT4 level is important for reproductive health, but isolated FT4 measurements without other thyroid parameters (such as TSH) are of limited value. For fertility issues, a medical evaluation of the entire thyroid status is recommended.