Estrogen levels test

Explanation

An estrogen test measures one or more hormones involved in reproduction and other body functions, including bone health. Estrogen is present in everyone. The meaning of a result depends on which estrogen was tested and why.

Which estrogen is on the report?

Estradiol is often written E2 and is a major estrogen during the reproductive years. Estrone is E1. Estriol, or E3, rises during pregnancy. These names describe different hormones, so their results are not interchangeable.

Why can results change?

Levels vary with age, the menstrual cycle, pregnancy and menopause. Hormone medicines can also affect interpretation. Testing may help investigate irregular periods or fertility problems, or monitor treatment. A result outside the listed range does not establish one particular diagnosis.

What information helps interpret the number?

Check the hormone name, sample type and laboratory range. Tell the clinician about hormone medicines and, if relevant, when the sample was taken in your cycle. Sometimes repeated measurements are more useful than a single value. Do not stop prescribed hormones without advice.

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