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Progesterone, Serum (Concentration)

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of progesterone hormone in your blood. Progesterone is important for reproductive health and helps regulate the menstrual cycle and pregnancy.

Quick summary

["Progesterone levels help diagnose fertility issues, evaluate ovarian function, or monitor pregnancy."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
47186-2
Short code
Progest 30M p chal SerPl-sCnc
Synonyms
Progest 30M p chal SerPl-sCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
80
Ref high
200
Critical range
20 N/A – 400 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84436
SNOMED
302346007
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have irregular menstrual periods, trouble getting pregnant, symptoms of hormonal imbalances, or if you’re undergoing fertility treatments. It can also be used to check for conditions like polycystic ovary syndrome (PCOS) or to assess early pregnancy.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the draw if your lab requires it. Bring any medications or supplements you’re taking, as they could affect results.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. It only takes a few minutes, and you may feel a slight pinch. The blood is sent to a lab for analysis.

What the Results Mean

Results are compared to a general reference range, but your specific range may vary based on your cycle phase (e.g., mid-cycle vs. late follicular). High or low levels can signal underlying health concerns.

Reference range

Adult: 80-200 ng/dLN/A

Specimen: serum

Take your thyroid medication after the blood draw if applicable. No fasting required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Progesterone

Frequently asked questions

How often should I get this test?
Typically, this test is checked during specific phases of the menstrual cycle (e.g., mid-luteal phase) or as part of a broader hormonal evaluation. Follow your provider’s guidance for timing and frequency.
Can diet or supplements affect progesterone levels?
Certain foods (like soy, flaxseed) and supplements (e.g., evening primrose oil, black cohosh) may influence hormone levels indirectly. Always discuss potential supplements with your provider before testing.
Is there anything I should avoid before the test?
Avoid smoking or excessive alcohol 24 hours before testing, as these can temporarily alter hormone measurements. If you’re on hormonal birth control, note its type and timing for context.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy