Test library
Progesterone Lab Panel
This blood test measures progesterone, a hormone that rises after ovulation and supports the menstrual cycle. Results are interpreted relative to cycle timing and clinical context.
Order Progesterone Level Lab Test (Blood)
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Progesterone Level Lab Test (Blood)- Typical turnaround
- 1-3 business days
- Starting price
- From $45
- Results
- Confidential, online
Quick answer
The Progesterone Level Blood Test measures the amount of progesterone in a blood sample. Progesterone is a hormone produced mainly by the ovaries after ovulation, and it helps prepare and maintain the uterine lining. Levels change predictably across the menstrual cycle, which is why the timing of the sample matters. The test is commonly used to gather information about ovulation and cycle function, and it is interpreted by a healthcare provider alongside other hormone results.
What this test measures
Progesterone belongs to the steroid hormone family and is produced by the corpus luteum after an egg is released, and later by the placenta during pregnancy. Its level typically rises in the second half of the menstrual cycle and falls if pregnancy does not occur. Measuring progesterone in blood provides a snapshot of that activity, which is why the cycle day of collection is important for interpretation.
The test is performed on a serum sample, and results are reported as a quantitative concentration using the units specified by the laboratory. Related hormones such as estradiol, luteinizing hormone, follicle-stimulating hormone, or hCG may be ordered together when a broader evaluation of the cycle or early pregnancy is needed. Reference ranges differ by cycle phase, so the report is read in that context.
People may order this test when a healthcare provider is evaluating ovulation, irregular cycles, fertility, or early pregnancy concerns. It can also be used to follow hormone activity over time when results are compared between cycle phases. A qualified healthcare provider should interpret the result with the clinical picture rather than as a stand-alone finding.
- Progesterone, serum
- Quantitative result reported in the laboratory's designated units
- Estradiol when included in a hormone panel
- Luteinizing hormone when included in a hormone panel
- Follicle-stimulating hormone when included in a hormone panel
- Human chorionic gonadotropin (hCG) when included for early pregnancy evaluation
Why people order this test
- Gather information about whether ovulation has occurred
- Evaluate progesterone activity during the menstrual cycle
- Support fertility-related hormone assessments
- Follow progesterone levels over time when serial testing is ordered
- Add detail to an evaluation of irregular or absent periods
- Complement other hormone results ordered by a healthcare provider
How to prepare
No fasting is usually required. The collection day of your menstrual cycle may be specified by the ordering provider because progesterone levels change across the cycle. A blood sample is drawn at the lab, and normal meals are generally fine unless other tests require fasting.
Understanding your results
Results are typically available within one to three business days. Progesterone values are interpreted relative to the cycle phase and the reason for testing, so the same number can have different meanings at different times. A qualified healthcare provider should review the result with your history and other tests.
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Frequently Asked Questions
When should a progesterone test be done?
Timing depends on the reason for testing. Providers often request collection during a specific part of the cycle, such as the second half, because levels change with cycle phase.
What does a progesterone result tell my healthcare provider?
It provides information about hormone activity at a point in time, which can support evaluation of ovulation and cycle function when combined with other findings.
Can this test be used to detect pregnancy?
Progesterone alone cannot confirm pregnancy. Pregnancy testing measures hCG, which may be ordered separately or alongside progesterone.
Do I need to fast for this test?
Fasting is usually not required, but follow any instructions given with your order in case additional tests are included.
How is the sample collected?
A small blood sample is drawn from a vein, usually in the arm, during a short lab visit.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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