Evidence check: TSH Schilddrüse in the context of fertility

The provided knowledge context contains no information about TSH (thyroid-stimulating hormone) or thyroid function in relation to fertility. TSH is a clinical blood marker routinely measured in fertility workups, and the link between thyroid health and fertility is well established in medical practice. The available context covers DNA tests (e.g., rs6721961 in NRF2, FTO, MTHFR) and microbiome analyses, but none address thyroid markers. Therefore, no evidence from these sources supports using a MyBody-X test to assess TSH for fertility purposes. The evidence grade for such tests in this context is unclear or absent. Consumers should rely on clinical TSH measurements and physician guidance, not direct-to-consumer genetic or microbiome tests, which lack validated thyroid markers.