High TSH levels usually mean the thyroid is underactive, which is called hypothyroidism. TSH levels can change due to factors like age, sex, and pregnancy. TSH influences thyroid hormones that control ...

Subclinical hyperthyroidism means that a person has low or undetectable levels of thyroid-stimulating hormone (TSH) with normal levels of free thyroid hormones. It usually does not cause symptoms. The ...

Thyroid-stimulating hormone (TSH) prompts the thyroid gland to increase hormone production. Your body uses TSH to control thyroid hormone levels. TSH ensures you have the thyroid hormones to regulate ...

Women with higher-than-normal thyroid-stimulating hormone (TSH) levels before starting in vitro fertilization (IVF) may have fewer eggs available for treatment. But according to new research from ...