Insulin - Like Growth Factor ( IGF-I ) Somatomedin C - Serum
Also Known As
Test Parameters Included
- Serum IGF-1 (Somatomedin C) Concentration (ng/mL or μg/L)
- Pathologist Endocrinology Remark – mapped against age and sex-specific reference intervals for GH axis assessment
Department
Methodology
Sample Required
Preparation
* Medications: Inform your doctor about all prescription and over-the-counter medications you are taking, as some can affect IGF-I levels (e.g., estrogens, corticosteroids, high-dose growth hormone). Do not discontinue any medication without consulting your doctor.
* Sample Collection: Standard venipuncture is performed to collect blood into a Red Top (plain) or SST tube. Proper handling (prompt centrifugation and freezing of serum) is essential.
Schedule Report
72 Hours
Emergency Report
Yes
Frequently Asked Questions
Is fasting required for IGF-1 test?
No, fasting is not required. IGF-1 levels remain relatively stable throughout the day and are not significantly affected by recent food intake.
What does the IGF-1 test measure?
It measures the level of Insulin-like Growth Factor 1 (Somatomedin C), a hormone produced by the liver in response to Growth Hormone (GH). It reflects overall GH activity over time, unlike GH which fluctuates rapidly.
Why is IGF-1 preferred over Growth Hormone testing?
GH is secreted in pulses and has a short half-life, making random GH levels unreliable. IGF-1 has a longer half-life and stable circulating levels, providing a better indicator of average GH secretion.
What conditions is IGF-1 used to diagnose?
IGF-1 is primarily used to evaluate Growth Hormone deficiency in children and adults, and to screen for acromegaly or GH-secreting tumors in adults.
How are results interpreted?
Results are compared against age- and sex-specific reference ranges. Low IGF-1 may indicate GH deficiency, while elevated levels may suggest acromegaly or gigantism.
How to access the report?
Verified PDF report is available within 24–48 hours via www.drpatholab.in or through WhatsApp/Email from Dr. Patho Labs, Chhatrapati Sambhajinagar.
Test Description
Test Code
I08
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