17-Hydroxyprogesterone (17-OHP)
17-Hydroxyprogesterone (17-OHP) is a steroid hormone made in the adrenal glands and ovaries or testes. On a blood test, it helps show how much of this hormone is circulating and how it compares with the 17-Hydroxyprogesterone normal range. The 17-OHP test is often reviewed as part of a hormone panel, where high 17-OHP or low 17-OHP can reflect differences in hormone production or timing of the sample.
What Is 17-Hydroxyprogesterone (17-OHP)?
17-Hydroxyprogesterone (17-OHP) is a steroid hormone measured in blood. It is made in the adrenal glands and, in smaller amounts, in the ovaries or testes. A 17-Hydroxyprogesterone on a blood test shows how much of this hormone is circulating at the time of the sample and is reported as a 17-Hydroxyprogesterone test result.
Why Is 17-Hydroxyprogesterone (17-OHP) Tested?
The 17-OHP test is usually ordered as part of a hormone panel, not a routine chemistry panel like a CMP or lipid panel. It is used to give a snapshot of steroid hormone production and how that result fits with other hormone markers. In a 17-Hydroxyprogesterone on a lab report, the value helps describe hormone balance alongside related test results. The full name, 17-Hydroxyprogesterone, is often shortened to 17-OHP on lab reports.
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17-Hydroxyprogesterone (17-OHP) Normal Range
| Group | Range | Unit |
|---|---|---|
| Adult Male | 27–199 | ng/dL |
| Adult Female | 15–70 | ng/dL |
Reference ranges may vary by laboratory and individual factors.
What Does High 17-OHP Mean?
A high 17-OHP result means more 17-Hydroxyprogesterone is circulating than expected for the reference interval. In a 17-Hydroxyprogesterone test result, high 17-OHP is often interpreted as increased steroid precursor production or slower conversion into other hormones. Values above the 17-Hydroxyprogesterone reference range, such as above about 200 ng/dL in many adult blood test settings, are commonly considered high 17-OHP, although the exact cutoff depends on the lab method and timing of the sample. When someone asks what does 17-OHP mean, the answer depends on the rest of the hormone panel and the collection conditions.
Associated factors
What Does Low 17-OHP Mean?
A low 17-OHP result means less 17-Hydroxyprogesterone is circulating than expected for the reference interval. In a 17-Hydroxyprogesterone test result, low 17-OHP can reflect reduced steroid precursor production, faster conversion into downstream hormones, or a sample taken under conditions that shift hormone levels downward. Values below the 17-Hydroxyprogesterone normal range, such as below about 20 ng/dL in many adult blood test settings, are commonly considered low 17-OHP. The exact interpretation depends on the assay, collection time, and the rest of the hormone panel.
Associated factors
How 17-Hydroxyprogesterone (17-OHP) Relates to Other Values
17-OHP is often read with other hormone markers from the same panel to build a fuller picture of steroid production. Related values may include progesterone, cortisol, androstenedione, and testosterone, which help show how hormone pathways connect. When 17-Hydroxyprogesterone on a lab report is reviewed alongside these markers, the pattern can show whether the measured hormone is part of a broader shift in steroid output. The 17-Hydroxyprogesterone reference range is also interpreted with the collection time and assay type in mind.
What Factors Affect 17-Hydroxyprogesterone (17-OHP) Levels?
Age, sex, and life stage can shift the 17-Hydroxyprogesterone normal range because steroid production changes over time. Time of day matters, since 17-OHP can vary across the day. Hydration can change the measured concentration by affecting plasma volume. Pregnancy and recent exercise can also move the 17-Hydroxyprogesterone test result up or down. Different lab methods and reference intervals can make one 17-OHP result not directly comparable with another from a different lab.
How It Is Tested
The 17-OHP test is done on a blood sample, usually drawn from a vein in the arm. The laboratory measures the amount of 17-Hydroxyprogesterone in the sample and reports a 17-Hydroxyprogesterone test result. Common units are ng/dL or nmol/L, depending on the lab.
How to Prepare
No fasting is usually required for a 17-OHP test unless the ordering panel includes other tests with different instructions. Because 17-Hydroxyprogesterone on a blood test can vary by time of day, collection timing may matter for comparison across tests.
Frequently Asked Questions
What is a normal 17-OHP level?
What does 17-OHP stand for?
What does a high 17-Hydroxyprogesterone mean on a lab report?
What does a low 17-Hydroxyprogesterone mean on a lab report?
Can hydration affect 17-Hydroxyprogesterone?
What is the difference between 17-Hydroxyprogesterone and progesterone?
What unit is 17-Hydroxyprogesterone measured in?
How much can 17-Hydroxyprogesterone change between tests?
Is 17-Hydroxyprogesterone different for men and women?
Why is 17-Hydroxyprogesterone tested in a hormone panel?
Disclaimer
This content is for informational and educational purposes only. It is not intended as medical advice, diagnosis, or treatment recommendation. Reference ranges may vary by laboratory. Always discuss your results with a qualified healthcare professional.
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