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Free thyroxine (free T4) tests are used to help evaluate thyroid function and diagnose thyroid diseases, including hyperthyroidism and hypothyroidism, usually after discovering that the thyroid stimulating hormone (TSH) level is abnormal.
This test measures the level of follicle-stimulating hormone (FSH) in your blood. FSH is made by your pituitary gland, a small gland located underneath the brain. FSH plays an important role in sexual development and functioning.
A progesterone test is a blood test. It can help your doctor check on ovulation or possible fertility problems, make sure everything is OK if you’re already pregnant, or help find out why you have abnormal bleeding from your uterus.
The total testosterone test measures testosterone that is bound to proteins in the blood as well as testosterone that is not bound (free testosterone).
