Hormones

Estrogen — So Much More Than a 'Female' Hormone

Let's clear something up: estrogen isn't just a 'women's hormone.' Men produce it as well, and it matters for both. Estradiol (E2) is the most active form, and it influences everything from your liver and bones to your nervous system and immune defence. When estrogen levels drift too high or too low, the effects ripple across your entire body. Testing gives you the full picture.

Why Test Estrogen?

Estrogen testing is key if you're going through fertility treatment, managing menopause, tracking ovarian function, or just trying to understand irregular periods. Lifestyle and diet have a huge impact on estrogen balance, so regular monitoring can show you whether the changes you're making are actually working.

What Do High Estrogen Levels Mean?

High estrogen can be driven by PCOS, thyroid disorders, obesity, certain medications (HRT, birth control), liver issues, or estrogen-secreting tumours. Classic signs: weight gain around hips and thighs, menstrual irregularities, breast tenderness, mood swings, headaches, fatigue, bloating, and hair thinning.

What Do Low Estrogen Levels Mean?

Low estrogen can bring irregular or missing periods, hot flashes, night sweats, mood shifts, depression, fatigue, vaginal dryness, painful sex, lower libido, and bone density loss. It's common during menopause but can also result from over-exercising or eating disorders.

Symptoms to Watch For

  • Irregular or absent periods
  • Hot flashes and night sweats
  • Mood swings or depression
  • Breast tenderness
  • Decreased libido
  • Bone density loss

Who Should Get Tested?

  • Women experiencing menopausal symptoms
  • Those undergoing fertility treatment or IVF
  • Women with irregular or absent periods
  • Anyone on hormone replacement therapy
  • Men with symptoms of hormonal imbalance

How to Prepare for Your Test

Wait two days after applying an estrogen patch, or two to four hours after taking oral estrogen or applying estrogen gel, before taking this test. Bring valid ID. If you take a supplement containing biotin (often sold for hair and nails), pause it for two days before the test, as high doses can distort the result.

Order Your Blood Test

Test your Estrogen levels with an accredited Swedish laboratory. Results within days, reviewed by Wellth.

Estradiol (E2) →

Frequently Asked Questions

When in my cycle should I test estrogen?
For fertility purposes, estrogen is usually tested on day 3 of your cycle. Your healthcare provider will advise on the best timing for your situation.
Can men have estrogen imbalances?
Absolutely. Men produce small amounts of estrogen. Too much can cause breast tissue growth, weight gain, and mood changes. Too little can weaken bones.
Does obesity affect estrogen levels?
Yes. Fat tissue actually produces estrogen, so carrying extra weight can push levels up in both men and women.
NW

Reviewed by

Wellth Team

Wellth

Our content is written and reviewed by Wellth, and fact-checked against peer-reviewed research and current Swedish clinical guidelines.

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Medical Disclaimer

The information on this page is provided for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Wellth provides health information and testing services but is not a substitute for clinical care. Always consult a qualified healthcare provider if you have questions about a medical condition. If you are experiencing severe or urgent symptoms, contact your doctor or call 1177 Vårdguiden. Blood test results should be interpreted by a qualified healthcare professional in the context of your complete medical history.