Estradiol test: Uses, results, and what to expect

Estradiol test: Uses, results, and what to expect

What is an estradiol test and why is it used?

By Bethany Cadman

Reviewed by Deborah Weatherspoon, PhD, RN, CRNA

Last reviewed Wed 26 September 2018

An estradiol test is a simple blood test to measure the amount of estradiol in a person's blood. Estradiol, also known as E2, is one of the four types of estrogen that the ovaries chiefly produce. The adrenal glands, placenta, testes, and some tissues also produce smaller amounts of this hormone.