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Luteinizing Hormone Blood Test


Why is this procedure done?


Luteinizing hormone is also known as LH. This test checks the level of LH in your blood or urine. LH is a hormone made by the pituitary gland in your brain. It is important in both men and women for pregnancy to happen. In women, LH controls when the egg will be released. In men, LH stimulates testosterone and plays a role in sperm production. ‚  
The doctor may order a LH level to: ‚  
  • Check how well your pituitary gland is working
  • Learn more if you are having problems getting pregnant
  • Look for tumors
  • Learn about reasons why puberty is delayed or earlier than expected
  • See how well your treatment is working
  • Go along with other tests


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What will the results be?


  • The doctor will look at the results of your test. The doctor may learn that you have signs of an illness that needs treatment.
  • If the results are normal, it means your body is likely working in a normal way.
  • If the results are not normal, you may have an illness. Your doctor may order more tests to learn more about what is wrong.
  • Your doctor may order another test. This will help check a result that is not normal or to learn more about a diagnosis.
  • The doctor will talk with you about treatment.

What happens before the procedure?


  • There are no special things to do before the test.
  • Talk to your doctor about:
    • All the drugs you are taking. Some kinds of drugs may need to be stopped for a period of time before this test.
    • If you have any bleeding problems
    • If you are a woman, ask if your sample needs to be collected at a specific time of your menstrual cycle.

What happens during the procedure?


It will only take a few minutes to have this test. ‚  
Blood test: ‚  
  • You will have a small amount of blood taken from you with a needle. You may have a small amount of pain. The needle will be taken out and a bandage will be put on your skin. The lab will test your blood to see how much LH is in it.

Urine test: ‚  
  • You will use a clean plastic cup to catch some of your urine.
  • Wash your hands well with soap and warm water.
  • Do not touch the inside of the cup or lid.
  • Start to pass urine into the toilet. After a few seconds, catch some urine using the plastic cup. Make sure your cup is about 1/3 full of urine.

24-hour urine collection test: ‚  
  • First thing in the morning, empty your bladder of urine into the toilet. Do not save this urine. Mark down the time so you can remember. You will need to collect all your urine until the next morning at this time.
  • The next time you need to go, place the small cup into your urine stream. Collect your urine in the cup.
  • Empty the cup into the large collection container. Keep the large container in the refrigerator.
  • Save all of your urine in the container for 24 hours. Be sure to empty your bladder one last time just before the end of the 24-hour period and add it to the container.
  • Take your urine container to the lab as soon as possible.

What happens after the procedure?


  • After the blood test, you may want to sit quietly for a few minutes before standing up. This will help keep you from feeling dizzy after the test.
  • Put pressure with your other hand where the needle was. This will help with bruising and bleeding.
  • Ask your doctor when you will get the results.

What care is needed at home?


You may do your everyday activities when you get back home. ‚  

What follow-up care is needed?


Your doctor may ask you to make visits to the office to check on your progress. Be sure to keep these visits. This test will help your doctor understand if you have a problem with your LH level. Together you can make a plan for more care. ‚  

What problems could happen?


  • Pain
  • Bruising
  • Bleeding
  • Feeling dizzy
  • Infection

Where can I learn more?


American Association for Clinical Chemistry ‚  
http://labtestsonline.org/understanding/analytes/lh/tab/test/ ‚  
KidsHealth ‚  
http://kidshealth.org/parent/system/medical/blood_test_lh.html ‚  

Consumer Information Use and Disclaimer


This information is not specific medical advice and does not replace information you receive from your health care provider. This is only a brief summary of general information. It does NOT include all information about conditions, illnesses, injuries, tests, procedures, treatments, therapies, discharge instructions or life-style choices that may apply to you. You must talk with your health care provider for complete information about your health and treatment options. This information should not be used to decide whether or not to accept your health care providers advice, instructions or recommendations. Only your health care provider has the knowledge and training to provide advice that is right for you. ‚  

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