What role does TSH Schilddrüse play in Fruchtbarkeit?

TSH (thyroid-stimulating hormone) is a key regulator of thyroid function. Balanced TSH levels are critical for fertility because thyroid hormones directly and indirectly influence the menstrual cycle, ovulation, and implantation. Both hyperthyroidism (low TSH) and hypothyroidism (high TSH) can cause cycle irregularities, anovulation, and increased miscarriage risk. In fertility medicine, a target TSH below 2.5 mU/L is recommended before and during pregnancy. The evidence is human-strong: numerous clinical studies and guidelines (e.g., from the American Thyroid Association) confirm this link. Importantly, TSH tests measure current hormone status, not genetic predisposition. Direct-to-consumer DNA tests for thyroid-related genes (e.g., TSHR, DIO2) lack clinical validity for fertility counseling and are not recommended by professional societies. A simple blood test for TSH remains the evidence-based standard. Marketing claims that promise genetic 'thyroid optimization' to boost fertility are scientifically unsupported.