Estradiol is one of the three major components that make up the estrogen hormone. Estradiol is the most potent endogenous estrogen. E2 is a commonly knows term for estradiol, which is released from the ovaries and adrenal glands in nonpregnant females. This test is prescribed to measure estradiol levels in women. Men also secrete estradiol, … Continue reading What is Estradiol Test? | Estradiol Importance, Normal Range Levels & More