Test guide
17-Hydroxyprogesterone Test
A 17-hydroxyprogesterone test measures the amount of 17-hydroxyprogesterone (17-OHP) in a sample of your blood. 17-OHP is a substance that your adrenal glands make. Health care providers can use this test to help diagnose a group of uncommon genetic disorders that affect the adrenal glands. These genetic adrenal gland disorders are called congenital adrenal hyperplasia (CAH). Your adrenal glands are two small organs that sit on top of each kidney. They make different types of hormones , which are chemical messengers in your bloodstream that control the actions of certain cells or organs.
What it is for
A 17-OHP test is used to help find and monitor the most common type of CAH, which is sometimes called 21-hydroxylase deficiency. This condition is often organized into two groups, based on how severe your symptoms are and at what age those symptoms show up. Your provider can use 17-OHP testing to: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- 17-OH progesterone, 17-OHP, 17 alphahydroxyprogesterone, 17 hydroxy progesterone: serum, progesterone: 17-hydroxy
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