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Also known as: Somatomedin C
Formal name: Insulin-like Growth Factor - 1
Related tests: Growth Hormone, Growth Hormone Releasing Hormone, Glucose Tests, Glucose Tolerance Test, Free T4, TSH, IGFBP-3

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At a Glance

Why Get Tested?

To help diagnose growth hormone (GH) deficiency or, less commonly, growth hormone excess; to evaluate pituitary function; to monitor the effectiveness of GH treatment

When to Get Tested?

When a child has signs and symptoms of slow growth, short stature, and delayed development or an adult has decreased bone density, reduced muscle strength, and increased lipids that suggest insufficient GH and IGF-1 production; when a child or adult has signs and symptoms of gigantism or acromegaly, respectively, that suggest excess GH and IGF-1 production; during and after treatment for GH abnormalities; when a pituitary disorder is suspected

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

Generally none, unless instructed to fast