Can FT3 help with fertility?

The question of whether FT3 (free triiodothyronine) can help with fertility cannot be answered from the provided context, which contains no information on thyroid hormones or FT3. Generally, a euthyroid state is important for fertility, but FT3 supplementation alone is not an established treatment. In reproductive medicine, TSH is the primary marker; FT3 is only supplemented in cases of documented deficiency and under medical supervision. Evidence for a direct benefit of FT3 on fertility without thyroid disease is weak and unsupported by the given sources. Caution is warranted: self-medication with thyroid hormones can cause hyperthyroidism and cardiac arrhythmias. Consult an endocrinologist or reproductive specialist.