Tests & Procedures

Tests and Procedures: F

  • Follicle-Stimulating Hormone

    This test measures the level of follicle-stimulating hormone (FSH), an important hormone made in your pituitary gland.

  • Foraminotomy

    A foraminotomy is a surgical procedure. It enlarges the area around one of the bones (vertebrae) in your spinal column. The surgery relieves pressure on compressed nerves. Here's what you need to know about the procedure.

  • Fragile X Syndrome (Amniotic Fluid)

    This test checks a sample of your amniotic fluid to find out whether your fetus may have fragile X syndrome, a rare genetic disorder.

  • Free and Bound T4

    This test to measures the level of the hormone thyroxine (T4) in your blood. This test can show your doctor whether your thyroid gland is overactive (hyperthyroidism) or underactive (hypothyroidism).

  • Free and Bound Triiodothyronine (Blood)

    This test measures the level of triiodothyronine (T3) in your blood. T3 is a type of hormone made by your thyroid gland.

  • Free Androgen Index

    This test is used to find out whether your levels of the hormone androgen are normal. The levels are different for men and women.

  • Free Light Chains (Blood)

    This test looks for signs of antibodies called immunoglobulins in your blood. It can help diagnose an illness called multiple myeloma.

  • Free T4

    This test measures the level of free T4 in your blood. It helps your healthcare provider know how well your thyroid is working.

  • Free Testosterone

    This test measures both your total and free testosterone levels. Having levels that are too high or too low can cause health problems.

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