Thyroid Stimulating Hormone (TSH) are made by the pituitary gland in the brain to stimulate the thyroid gland (located by the throat). The hormones that are produced are used to regulate weight, body temperature and muscle strength. Levels of TSH are measured as it is an indicator of thyroid disease and is commonly tested with Free T4 and Free T3.

Free T4 (free thyroxine) is a hormone produced by the thyroid gland. This hormone is involved in several body functions including metabolism and growth. It can be used for the diagnosis of thyroid diseases such as hypothyroidism or hyperthyroidism as well as aiding the diagnosis of female infertility problems. Free T4 is commonly tested with Free T3 and TSH.

Free T3 (free triiodothyronine) is a hormone produced by the thyroid glands. This hormone is involved in several body functions including metabolism. It can be used to aid the diagnosis of thyroid diseases such as hyperthyroidism. Free T3 is commonly tested with Free T4 and TSH

Antithyroglobulin Antibodies (Anti-Tg) are produced by the immune system as a defence mechanism to protect the thyroid against foreign invaders. Autoimmune condition will increase the amount of anti-Tg in the body, attacking healthy thyroid cells. Anti-Tg tests are used to diagnose thyroid disorders and are an indicator for autoimmune conditions.

Thyroid Peroxidase Antibodies (Anti-TPO) are produced by the immune system as a defence mechanism to protect the thyroid against foreign invaders. Autoimmune condition will increase the amount of anti-TPO in the body, attacking healthy thyroid cells. Anti-TPO tests are used to diagnose thyroid disorders and are an indicator for autoimmune conditions.