Understand Your Test

Insulin-like Growth Factor-1 (IGF-1)

Formal Name

 Insulin-like Growth Factor - 1

Why Get Tested?

To help diagnose growth hormone (GH) deficiency or, less commonly, growth hormone excess; to evaluate pituitaryfunction; 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 lipidsthat 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.