E2 (Estradiol)

An E2 (Estradiol) test measures the amount of the hormone estradiol, a hormone produced by both males and females. Though estradiol is primarily a female sex hormone that is produced by the ovaries, breasts, and adrenal glands, males also produce it but in small amounts. You may need this test to check for menstrual problems, early or delayed puberty, menopause symptoms, or certain types of cancer such as breast cancer.