Estriol

Estriol, also known as E3, is a natural estrogen hormone produced during pregnancy. It is a weaker form of estrogen compared to estradiol and estrone. Estriol is used in various medical applications, including hormone replacement therapy (HRT) for postmenopausal women to alleviate symptoms such as hot flashes, vaginal dryness, and sleep disturbances. It also has a history of use in the treatment of certain types of breast cancer due to its weak estrogenic activity. In addition, estriol has been shown to have beneficial effects on the vaginal and urinary tracts, making it a popular choice for treating atrophic vaginitis and urinary incontinence. Estriol should only be administered under the supervision of a healthcare professional, as it may have side effects and interactions with other medications.