The TSH 3rd Generation test measures the level of thyroid-stimulating hormone (TSH) in the blood with high sensitivity. This test helps assess thyroid function and is crucial for diagnosing and managing thyroid disorders, such as hypothyroidism and hyperthyroidism. Third-generation TSH testing can detect even small changes in TSH levels, providing a more accurate evaluation of thyroid health. It is often used alongside T3 and T4 tests for a complete thyroid profile.