Estradiol (E2) — What It Means in Your Blood Test
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Estradiol is the main form of estrogen and guides the menstrual cycle, fertility, and bone health.
Your Estradiol (E2) reading shows how much of this leading estrogen is present in your blood. Clinicians weigh it against your stage of life, your symptoms, and other findings.
Also known as: E2, 17-beta estradiol, Oestradiol, Estradiol
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 Estradiol (E2)?
Estradiol is the strongest natural estrogen. In women it comes mainly from the ovaries, with smaller amounts from the testes and adrenal glands.
Why is Estradiol (E2) tested?
You may have this test to check ovary function, cycle changes, or fertility. It also shows where you are in the menopause transition.
What is a normal Estradiol (E2) range?
- India
- No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison.
- Global
- Women (follicular): 12–166 pg/mL; Women (mid-cycle peak): up to ~400 pg/mL; Women (luteal): 43–211 pg/mL; Postmenopausal women: <10–20 pg/mL; Men: 10–40 pg/mL
Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
Source: [Endocrine Society, 2015]
What does your Estradiol (E2) 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 Estradiol (E2) result mean?
A high result can link to ovarian cysts, certain growths, or estrogen taken from an outside source. Your doctor can help interpret it in your context.
What does a low Estradiol (E2) result mean?
A low result can go with menopause, ovaries that stop working early, or signals from the brain being turned down. This is worth discussing with your doctor.
What can affect your Estradiol (E2) result?
- Phase of the menstrual cycle
- Menopause status
- Hormones taken from an outside source
- Body weight
- Liver function, which helps process estrogen
Questions to ask your doctor
About this result
- What does my Estradiol (E2) result mean for me specifically, given my age and health?
- Is my Estradiol (E2) 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 Primary estrogen level result?
- Is there anything I should do about my Estradiol (E2), or is it fine to leave as it is?
About retesting
- Does my Estradiol (E2) need to be repeated, and if so, when?
- The typical range for Estradiol (E2) can vary between labs — should I compare my result against my own lab's printed range?
The bigger picture
- Should my Estradiol (E2) be looked at together with my Total Testosterone and Free Testosterone result?
- Does my Estradiol (E2) connect to any condition I already have, or to anything I have noticed in how I feel?
Frequently asked questions
- What is Estradiol (E2)?
- Estradiol is the strongest natural estrogen. In women it comes mainly from the ovaries, with smaller amounts from the testes and adrenal glands. You may have this test to check ovary function, cycle changes, or fertility. It also shows where you are in the menopause transition.
- What is a normal Primary estrogen level range?
- A typical adult range is around Women (follicular): 12–166 pg/mL; Women (mid-cycle peak): up to ~400 pg/mL; Women (luteal): 43–211 pg/mL; Postmenopausal women: <10–20 pg/mL; Men: 10–40 pg/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 Estradiol (E2) result mean?
- A high result can link to ovarian cysts, certain growths, or estrogen taken from an outside source. Your doctor can help interpret it in your context.
- What does a low Estradiol (E2) result mean?
- A low result can go with menopause, ovaries that stop working early, or signals from the brain being turned down. This is worth discussing with your doctor.
- What can affect your Estradiol (E2) result?
- Several everyday factors can influence it, including Phase of the menstrual cycle, Menopause status, Hormones taken from an outside source, Body weight, Liver function, which helps process estrogen.
Sources
- Endocrine Society (2015) — Menopause Hormone Therapy Position Statement and related clinical guidelines
- ACOG (2022) — American College of Obstetricians and Gynecologists Committee Opinion on Hormone Replacement
Part of the Hormones
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