What Is a Normal Estrogen Level?

Estrogen levels are measured in picograms per milliliter (pg/ml) of estradiol, the predominant sex hormone found in women.

Identification

• For most women, the normal level of estrogen falls in the 50 to 400 pg/ml range of estradiol. This level will fluctuate depending on what stage the woman is in of the menstrual cycle.

Types

• Women who have undergone menopause will have different levels of estradiol than those who have not. The common level of post-menopausal women is 10 to 20 pg/ml.

Effects

• If a woman's estradiol level is below 100 pg/ml, she may experience menopausal symptoms such as hot flashes.

Time Frame

• Estrogen levels are at their highest in the cycle just before the woman ovulates. Levels will fall dramatically then, stimulating ovulation.

Considerations

• If a woman does not become pregnant following ovulation, estrogen levels will fall again, this time triggering a period.