A progesterone test measures the amount of the hormone progesterone in a blood sample.
Results are usually available within 24 hours.
The normal values listed here-called a reference range-are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
Progesterone levels during pregnancy
| 1st trimester:
10-44 ng/mL or 32.6-140 nmol/L
| 2nd trimester:
19.5-82.5 ng/mL or 62-262 nmol/L
65-290 ng/mL or 206.7-728 nmol/L
Progesterone levels in men
Less than 1 ng/mL or less than 3.2 nmol/L
Progesterone levels after menopause
Less than 1.0 ng/mL or less than 2 nmol/L
Many conditions can change progesterone levels. Your doctor will discuss any significant abnormal results with you in relation to your symptoms and past health.
High progesterone values may be caused by:
Low progesterone values may be caused by:
What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- The use of hormones, including those containing estrogen or progesterone (such as birth control pills).
- The use of medicines, such as ampicillin and clomiphene.
- The time of day when you have the test. Progesterone levels normally fluctuate during the day.
- Having a test such as a thyroid scan or bone scan that used a radioactive substance (tracer) within 1 week before the progesterone test.
- Where you are in your menstrual cycle.