Main AHCA Website

AHCA’s main website for information on Medicaid, Health Quality Assurance and the Florida Center for Health Information and Policy Analysis.

Go >

Florida Health Information Network

This website provides information and resources relating to AHCA’s initiatives for Health Information Technology and Health Information Exchange.

Go >


FloridaHealthFinder.gov

Provides health education and information to compare and locate health care providers in Florida to make well-informed health care decisions.

Go >
AHCA Network of Websites

Health Education


Health Encyclopedia

Search the Health Encyclopedia

Growth hormone test

Definition

The growth hormone test measures the amount of growth hormone in the blood.

Alternative Names

GH test

How the Test is Performed

A blood sample is needed.

How to Prepare for the Test

Your doctor may give you special instructions about what you can or cannot eat before the test.

How the Test will Feel

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or a slight bruise. This soon goes away.

Why the Test is Performed

Growth hormone is released from the pituitary gland. This is a small organ in the brain, located behind the nose.

  • Too much growth hormone can cause abnormally increased growth patterns called acromegaly in adults and gigantism in children.
  • Too little growth hormone can cause a slow or flat rate of growth in children, and changes in energy, muscle mass, cholesterol levels, and bone strength in adults.

The growth hormone test may be used to monitor response to acromegaly treatment.

Normal Results

The normal range for growth hormone level is typically:

  • 1 through 9 nanograms per milliliter (ng/mL) for males 
  • 1 through 16 ng/mL for females

GH is released in pulses. This is why random GH measurements are rarely useful. A higher level may be normal if the blood was drawn during a pulse. A lower level may be normal if the blood was drawn around the end of a pulse. GH is most useful when measured as part of a stimulation or suppression test.

Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different specimens. Talk to your doctor about the meaning of your specific test results.

What Abnormal Results Mean

A high level of growth hormone may indicate:

A low level of growth hormone may indicate:

  • Growth hormone deficiency
  • Hypopituitarism (low function of the pituitary gland)

Risks

Veins and arteries vary in size from one patient to another, and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.

Other risks associated with having blood drawn are slight, but may include:

  • Excessive bleeding
  • Fainting or feeling light-headed
  • Hematoma (blood accumulating under the skin)
  • Infection (a slight risk any time the skin is broken)

References

Guber HA, Farag AF. Evaluation of endocrine function. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 24.

Hosono H, Cohen P. Hyperpituitarism, tall stature, and overgrowth syndromes. In: Klliegman RM, Stanton BF, St. Geme JW III, et al., eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 554.

Review Date:5/10/2014
Reviewed By:Brent Wisse, MD, Associate Professor of Medicine, Division of Metabolism, Endocrinology & Nutrition, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial Team.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

adam.com

The Agency for Health Care Administration (Agency) and this website do not claim the information on, or referred to by, this site is error free. This site may include links to websites of other government agencies or private groups. Our Agency and this website do not control such sites and are not responsible for their content. Reference to or links to any other group, product, service, or information does not mean our Agency or this website approves of that group, product, service, or information.

Additionally, while health information provided through this website may be a valuable resource for the public, it is not designed to offer medical advice. Talk with your doctor about medical care questions you may have.

Health
Outcome Data

No data available for this condition/procedure.

Health Encyclopedia

More Features

We Appreciate Your Feedback
1. Did you find this information useful?
         Yes
         No

2. Would you recommend this website to family and friends?
         Yes
         No