Description
Why is it done?
The test is primarily used to help diagnose and monitor congenital adrenal hyperplasia (CAH), a genetic disorder that affects adrenal gland function. It may also be used to evaluate adrenal gland function or investigate causes of symptoms like:
- Excess body hair
- Irregular menstruation
- Infertility
- Ambiguous genitalia in newborns
Preparation
Fasting may be required in some cases. In women, the timing of the test may depend on the menstrual cycle phase.
Results Interpretation
High 17-OHP levels may indicate CAH or an adrenal tumor.
Low levels are usually not concerning but must be evaluated in context with other hormone tests.
