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Confirm growth hormone deficiency in your child with a GH stimulation test at Shishuka Children's Hospital, Bangalore. Expert pediatric endocrinology care.
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A specialised diagnostic test that confirms whether short stature or slow growth in your child is caused by growth hormone deficiency — performed and interpreted by pediatric endocrinologists at Shishuka Children's Hospital, Bangalore.
A Growth Hormone Stimulation Test (also called a GH stimulation test or growth hormone provocation test) is the gold-standard diagnostic procedure used to confirm growth hormone deficiency in children with short stature or unexplained slow growth. Since growth hormone is released by the pituitary gland in short, unpredictable bursts — usually during sleep — a single blood sample cannot reliably measure it. This test instead uses medication to safely stimulate the pituitary gland, allowing doctors to measure how much growth hormone the body is actually capable of releasing.
At Shishuka Children's Hospital, this test is performed under close pediatric endocrinology supervision, in a controlled, monitored setting designed specifically for children — because an accurate diagnosis here directly shapes whether growth hormone therapy is the right next step.
A pediatric endocrinologist may recommend this test if a child shows signs suggestive of growth hormone deficiency, including:
Height significantly below the growth curve for age and sex
A growth rate slower than expected, even if current height still looks normal
A bone age significantly delayed compared to chronological age
Low IGF-1 levels found on an initial hormonal blood panel
No clear alternative cause for short stature, such as nutritional, genetic or chronic illness factors
A family history of growth hormone deficiency or pituitary conditions
Different stimulation agents (provocation agents) can be used, and your endocrinologist may combine two for confirmatory accuracy.
One of the most commonly used oral stimulation agents in pediatric growth hormone testing, generally well tolerated by children.
An injectable agent often chosen when a combined assessment of growth hormone and cortisol reserve is useful.
An amino acid infusion used as a stimulation agent, sometimes combined with other tests for a more definitive result.
Many pediatric endocrinology protocols use two stimulation agents on the same day, or on separate days, since a single agent test carries a higher chance of a false result.
Here's how the GH stimulation test fits alongside other tests used to evaluate a child's growth.
| Investigation | Invasiveness | Best For | Limitation |
|---|---|---|---|
| GH Stimulation Test | Minimally invasive | Confirming growth hormone deficiency | Takes 2–4 hours; multiple blood draws |
| IGF-1 Blood Test | Minimally invasive | Initial screening; single blood draw | Can be influenced by nutrition, illness; not confirmatory alone |
| Bone Age X-ray | Non-invasive | Estimating skeletal maturity & growth potential | Doesn't confirm a hormonal cause |
| Pituitary MRI | Non-invasive | Identifying structural pituitary causes | Usually done after GH deficiency is confirmed, not instead of it |
A structured, monitored process, usually completed in a single supervised visit.
Your child fasts overnight, and a review of current growth data, bone age and prior blood work confirms the test is appropriate. You'll receive clear fasting and timing instructions in advance.
A small IV cannula is placed, usually in the arm, so repeated blood samples can be taken without multiple needle sticks. A baseline blood sample is drawn first.
The stimulation agent is given, and blood samples are drawn at set time intervals over roughly 2–4 hours to track how growth hormone levels rise in response. Your child is monitored throughout for comfort and safety.
Once sampling is complete, the IV line is removed and your child can eat. Results take a few days to process, and are explained in detail at a follow-up visit, along with next steps if growth hormone therapy is recommended.
A carefully supervised, child-focused approach to a test that plays a defining role in your child's growth journey.
Tests supervised by specialists trained in interpreting pediatric growth hormone dynamics accurately.
Your child is closely monitored throughout the multi-hour test for comfort and safety.
Results interpreted alongside your child's full growth history and bone age, not in isolation.
A detailed, plain-language explanation of results and treatment options at your follow-up visit.
Care coordinated across Kalyan Nagar, RT Nagar, Malleswaram and New BEL Road.
Your child can eat and return to normal activities as soon as the test is finished. Mild nausea, headache or drowsiness can occur during or shortly after the test depending on the stimulation agent used, and these effects typically resolve within a few hours.
Because samples need to be analysed in a specialised lab, results are not available the same day. A follow-up appointment will be scheduled to go over the findings and, if growth hormone deficiency is confirmed, discuss treatment options such as growth hormone therapy.
Book a growth assessment with our pediatric endocrinology team to find out whether a growth hormone stimulation test is the right next step for your child.
We've compiled a list of the most frequently asked questions to help you find the information you need quickly and easily.
“If you can't find the answer to your question here, please don't hesitate to contact our support team for assistance.”
An IV line is placed once at the start, causing a brief pinch. After that, blood samples are taken through the same line without repeated needle sticks.
Typically 2 to 4 hours, including baseline sampling, the stimulation agent, and timed blood draws. Plan for a half-day visit.
Yes, an overnight fast is usually required, since food intake can affect hormone levels and skew results.
Your endocrinologist will discuss treatment options, most commonly growth hormone therapy, along with a long-term monitoring plan.