Estradiol

As one of the endogenous estrogen female sex hormones, estradiol is used in hormone replacement therapy associated with menopause and helps prevent osteoporosis in older women. Estradiol is the principal estrogen found in a woman's body during her reproductive years and is produced by her ovaries. It is much more potent than estriol, and acts an inhibitor of ovulation by inhibiting the release of follicle-stimulating hormone (FSH).