Progesterone — What It Means in Your Blood Test
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Progesterone is a hormone that prepares the womb for pregnancy and helps support it early on.
A Progesterone reading tells you how much of this hormone is circulating at the moment you gave blood. Its meaning shifts with timing, so doctors read it against where you are in your monthly rhythm.
Also known as: P4, Serum progesterone, Progestogen, 17-alpha hydroxyprogesterone precursor
This isn't a case where higher or lower is better. Your body keeps it in a narrow band, and both directions can matter.
Last reviewed: 2026-08-16
What is Progesterone?
Progesterone is a steroid hormone. After you release an egg the ovary makes it, and during pregnancy the placenta takes over.
Why is Progesterone tested?
You may have this test to confirm that you released an egg. It also helps check the second half of your cycle and early pregnancy.
What is a normal Progesterone range?
- India
- No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison.
- Global
- Follicular phase: 0.1–0.9 ng/mL; Luteal phase: 1.8–24 ng/mL; Pregnancy (first trimester): 11–90 ng/mL; Postmenopausal: <0.1–0.3 ng/mL; Men: 0.3–1.2 ng/mL
Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
Source: [American Society for Reproductive Medicine, 2021]
What does your Progesterone value mean?
There is no widely-accepted set of value bands for this parameter. Compare your result with the reference range printed on your own report, and discuss it with your doctor.
What does a high Progesterone result mean?
A high result outside the expected cycle phase can link to certain adrenal conditions or ovarian cysts. Your doctor can help interpret it.
What does a low Progesterone result mean?
A low result in the second half of the cycle can suggest a weaker egg release. It may also make early pregnancy harder to sustain. This is worth discussing with your doctor.
What can affect your Progesterone result?
- Phase of the menstrual cycle (very important)
- Pregnancy status
- Time of day
- Progesterone taken from an outside source
- Adrenal gland function
Questions to ask your doctor
About this result
- What does my Progesterone result mean for me specifically, given my age and health?
- Is my Progesterone in the range that is right for me, not just the lab's general range?
What to do next
- Could anything I eat, do, or take have affected my Pregnancy-support hormone level result?
- Is there anything I should do about my Progesterone, or is it fine to leave as it is?
About retesting
- Does my Progesterone need to be repeated, and if so, when?
- The typical range for Progesterone can vary between labs — should I compare my result against my own lab's printed range?
The bigger picture
- Should my Progesterone be looked at together with my Total Testosterone and Free Testosterone result?
- Does my Progesterone connect to any condition I already have, or to anything I have noticed in how I feel?
Frequently asked questions
- What is Progesterone?
- Progesterone is a steroid hormone. After you release an egg the ovary makes it, and during pregnancy the placenta takes over. You may have this test to confirm that you released an egg. It also helps check the second half of your cycle and early pregnancy.
- What is a normal Pregnancy-support hormone level range?
- A typical adult range is around Follicular phase: 0.1–0.9 ng/mL; Luteal phase: 1.8–24 ng/mL; Pregnancy (first trimester): 11–90 ng/mL; Postmenopausal: <0.1–0.3 ng/mL; Men: 0.3–1.2 ng/mL. No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison. Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
- What does a high Progesterone result mean?
- A high result outside the expected cycle phase can link to certain adrenal conditions or ovarian cysts. Your doctor can help interpret it.
- What does a low Progesterone result mean?
- A low result in the second half of the cycle can suggest a weaker egg release. It may also make early pregnancy harder to sustain. This is worth discussing with your doctor.
- What can affect your Progesterone result?
- Several everyday factors can influence it, including Phase of the menstrual cycle (very important), Pregnancy status, Time of day, Progesterone taken from an outside source, Adrenal gland function.
Sources
- American Society for Reproductive Medicine (2021) — ASRM Practice Committee Opinion on evaluation of the luteal phase
Part of the Hormones
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