Endocrine System Tests to check its Functionality and Disorders!

There are majorly eight glands in the endocrine system that helps to make hormones. These go through the blood stream to organs and tissues. They affect almost every process in the body. The endocrine system shapes growth, mood, metabolism, sexual function and many others. The endocrine system test that an endocrinologist prescribes to diagnose hormone related disorder range from diabetes to osteoporosis.


  • Below the voice box at the front of the neck is situated the thyroid gland. The hormones that releases from it affect weight, muscle strength, metabolism, brain development, functioning of nervous system, cholesterol levels, breathing and heart function. To diagnose primary thyroid disease the endocrinologist gives TSH, T4 and T3 tests to be done. These tests measures thyroid-stimulating hormone in the blood and the amount of active or free thyroid hormone available in the body tissue.
  • To check if the patient has Graves’ disease or other auto-immune disorder, which damages the thyroid, the doctor asks for thyroid-stimulating immunoglobulin and anti-thyroid antibody tests.
  • A test for radioactive iodine and thyroid scan lets the endocrinologists detect thyroid functioning and look for abnormalities in the gland.


  • The reproductive endocrinologist prescribes for serum progesterone test that shows the level of the hormone progesterone and also, indicates the existence of ovulation. To know if a women, who is above 35 and is looking to conceive, has enough healthy eggs for fertility or not, the doctors ask them for follicle-stimulating hormone blood test to be done. This test is also prescribed to diagnose menopause in women who witnesses trouble in sleeping, hot flashes and heart palpitations.
  • The doctor may ask for progestin challenge test to check the excretion of estrogen from pituitary gland or ovaries.


  • Diabetes is diagnosed with three tests. A fasting plasma glucose test is done after eight hours of having meal, whereas, a random plasma glucose test does not depend upon when the patient last ate.
  • To detect high blood sugar level, the endocrinologist prescribes oral glucose tolerance test that is performed after fasting for at least eight hours and after two hours of having sugary solution drink.


  • An abnormal level of Vitamin D can occur due to little or much release of calcium into the blood. The endocrinologist asks for several tests, such as 24-hour urine test, 25-hydroxy vitamin D test and a complete blood count to check calcium in the urine, abnormal levels of Vitamin D and scan for anemia, respectively.
  • There are other tests recommended for measuring the levels of bone-destroying and bone-forming cells in the urine and blood.


  • The doctor recommends blood tests for diagnosing growth-hormone disorder. An oral glucose tolerance test detect excessive hormones to check if there is increased head size, high blood pressure, extreme height, prediabetes and cardiac dysfunction.
  • A growth-hormone stimulation blood test is ordered to check for growth-hormone deficiency, such as short height in children and adults, decreased bone mass and muscle, insomnia, increased fat in the body and high cholesterol level.

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