Hormone Panel Updated Apr 17, 2026

Progesterone

Progesterone is a steroid hormone measured in blood to show how much of this hormone is circulating at the time of testing. On a lab report, Progesterone helps describe hormone patterns across different sex and reproductive states, and results are often read as part of a broader Hormones panel. The Progesterone test result is usually reported in ng/mL or nmol/L, and the Progesterone reference range depends on age and sex.

What Is Progesterone?

Progesterone is a steroid hormone measured in blood, not a red blood cell marker. On a Progesterone on a blood test, the result shows how much of this hormone is circulating at the time of collection. Progesterone on a lab report is often read as part of a Hormones panel rather than a general chemistry panel. The Progesterone test result is usually reported in ng/mL or nmol/L.

Why Is Progesterone Tested?

Progesterone is measured in a Hormones panel, and it may also appear in broader hormone-focused testing. A Progesterone test is used to document hormone levels at a single point in time and to compare them across repeated measurements. The Progesterone test result helps describe overall hormone balance when reviewed with other blood markers. Progesterone on a lab report is usually interpreted alongside the reason the panel was ordered.

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Progesterone Normal Range

Group Range Unit
Adult Male 0.2–1.4 ng/mL
Adult Female 0.1–25 ng/mL

Reference ranges may vary by laboratory and individual factors.

What Does High Progesterone Mean?

High Progesterone means the measured hormone level is above the lab's Progesterone reference range for that person. In many US references, values above about 20 ng/mL in a nonpregnant adult are often considered high, though ranges vary by sex, cycle timing, and lab method. A high Progesterone test result usually reflects increased hormone production or reduced clearance from the blood. High Progesterone on a lab report can also reflect a sample drawn at a time when this hormone is naturally expected to be higher.

Associated factors

Natural cycle timing — Progesterone can rise sharply during specific phases of the cycle, which increases the measured level.
Pregnancy-related hormone production — circulating Progesterone is often much higher when hormone output shifts upward.
Hormone therapy — added hormones can increase the Progesterone test result.
Certain fertility treatments — some medications raise circulating Progesterone or change when the blood draw is taken.
Reduced plasma volume — less fluid in the blood can concentrate Progesterone and make it read higher.
Time of day variation — Progesterone can shift across the day, so timing can change the number.
Age-related variation — normal Progesterone patterns differ by age and sex, which changes the expected range.
Lab method differences — different assays can produce slightly different high Progesterone results.
Recent exercise — temporary fluid shifts can concentrate blood markers and affect Progesterone.
Supplement use — some products can influence the measured Progesterone level or the timing of testing.

What Does Low Progesterone Mean?

Low Progesterone means the measured hormone level is below the lab's Progesterone normal range for that person. In many references, values below about 1 ng/mL in an adult outside hormonally active phases may be considered low, but the Progesterone reference range depends on context. A low Progesterone test result usually reflects reduced hormone production, greater clearance, or a blood draw taken at a time of naturally lower levels. Low Progesterone on a lab report does not describe blood count status; it describes hormone concentration in serum or plasma.

Associated factors

Early-cycle timing — Progesterone is naturally low before it rises later in the cycle.
No recent hormone exposure — without added hormone sources, the Progesterone test result may stay lower.
Increased fluid volume — more plasma can dilute circulating Progesterone.
Shift in body weight or energy intake — changes in hormone signaling can reduce measured Progesterone.
Certain medications — some medicines can lower circulating Progesterone or alter how it is processed.
Delayed sample timing — a blood draw taken at a low point in the cycle can show low Progesterone.
Stress-related hormone shifts — changes in hormone signaling can reduce the measured level.
Older age patterns — natural changes in hormone production can lower expected Progesterone.
Method variation — different lab platforms may report slightly low or high Progesterone values.
Frequent intense training — repeated exercise can alter hormone timing and lower the result at collection.

How Progesterone Relates to Other Values

Progesterone is often interpreted with other hormone markers on the same Hormones panel, such as estradiol (E2), luteinizing hormone (LH), and follicle-stimulating hormone (FSH). When Progesterone is read alongside these markers, the pattern helps describe where the body is in a hormone cycle. A high Progesterone test result with different E2, LH, or FSH values can show a different timing pattern than a low Progesterone result. Progesterone on a lab report is therefore most useful when compared with the rest of the hormone panel and the collection date.

What Factors Affect Progesterone Levels?

Progesterone varies naturally by sex, age, and timing of collection, so the same result can mean different things in different settings. A Progesterone normal range may also differ by laboratory method, because different assays can read slightly differently. Hydration status can shift the measured value by changing plasma concentration, which can make Progesterone look higher or lower. Time of day, recent exercise, and diet-related changes in fluid balance can all influence a Progesterone test result. Progesterone on a blood test is also affected by pregnancy-related hormone production and by added hormone products, which can move results away from the usual adult range.

How It Is Tested

Progesterone is measured from a blood sample, usually serum or plasma collected by venipuncture. The lab measures the concentration of Progesterone in the sample and reports it as a number, commonly in ng/mL or nmol/L. The Progesterone test result is then compared with the lab's reference interval.

How to Prepare

No fasting is usually required for a Progesterone test. Timing of collection can matter more than food intake, since Progesterone changes across the day and across hormone cycles.

Frequently Asked Questions

What is the normal range for Progesterone?
The Progesterone normal range depends on sex, cycle timing, and the lab method used. A commonly cited adult male reference range is about 0.2 to 1.4 ng/mL, while adult female values can vary widely across the cycle. The Progesterone reference range on a lab report should always be read against the lab's own interval.
What does Progesterone stand for?
Progesterone does not stand for another term; Progesterone is the full name of the hormone and the lab value. In a blood test, the Progesterone test result shows the measured concentration of that hormone in blood. It is often listed in a Hormones panel.
What does a high Progesterone mean on a lab report?
A high Progesterone result means the measured level is above the Progesterone normal range for that context. It usually reflects increased hormone production, a naturally higher timing point, or added hormone exposure. The exact meaning depends on the Progesterone test result and the collection timing.
What does a low Progesterone mean on a lab report?
A low Progesterone result means the measured level is below the expected Progesterone reference range for that person and timing. It can reflect a naturally low phase of the cycle, dilution from higher plasma volume, or reduced hormone production. A low Progesterone test result is best read with the date and panel context.
Can hydration affect Progesterone?
Yes. Hydration can affect Progesterone by changing plasma volume, which can slightly dilute or concentrate the measured value. This effect is usually smaller than timing or hormone-related changes, but it can still influence a Progesterone test result.
What is the difference between Progesterone and estradiol (E2)?
Progesterone and estradiol (E2) are different hormones that rise and fall in different patterns. Progesterone on a lab report is often used to show one part of hormone timing, while E2 shows another. Reading both together gives more context than either Progesterone test result alone.
What unit is Progesterone measured in?
Progesterone is commonly measured in ng/mL, and some labs also report it in nmol/L. The unit matters because the same Progesterone test result will look different after unit conversion. The lab report should list the unit next to the value.
How much can Progesterone change between tests?
Progesterone can change a lot between tests, especially when the blood draws are taken at different times. The amount of change depends on cycle timing, hormone exposure, and lab method. A Progesterone normal range is broad enough that timing often matters more than small day-to-day shifts.
Is Progesterone different for men and women?
Yes. Progesterone is usually lower in adult males and more variable in adult females. That is why the Progesterone reference range on a lab report is often separated by sex.
Why is Progesterone tested in a Hormones panel?
Progesterone is included in a Hormones panel to show one part of the body's hormone pattern at a single time point. It is often reviewed with other hormone markers such as estradiol (E2), LH, and FSH. That combination helps describe how the Progesterone test result fits into the overall 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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