This test looks for a parasite that causes the sexually transmitted disease trichomoniasis. It can cause complications during pregnancy.

This test measures the amount of the protein transferrin in your blood. It can give your doctor more information about health issues like anemia that are affecting your body's iron supply.

This test measures your level of TSH, a hormone made by your pituitary gland. You may need this test if you have symptoms of thyroid problems.

This test looks for antibodies made in response to a protein made by your thyroid. The test can help diagnose thyroid problems, including Hashimoto thyroiditis.

This test measures the amount of thyroid antibodies in your blood. The test can help find out whether you have a problem with your thyroid.

Thrombin time measures how long the blood's plasma, or the liquid portion of the blood, takes to form a clot.

This test measures the level of the medicine theophylline in your blood. Having too much of this medicine in your body can be life-threatening.

This test looks for tetanus antibody in your blood. If you have been vaccinated for tetanus in the past, this test should show that you have enough antibodies against the disease.

This test measures the level of testosterone in your blood. You may need this test if your doctor thinks you have low or high testosterone.

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