Estradiol Enanthate is defined as an ester derivative of estradiol, specifically the ester formed between estradiol and enanthic acid (a long-chain fatty acid). It is a synthetic form of estradiol, the primary estrogenic hormone produced by the ovaries, designed for prolonged release and use in medical applications. Estradiol Enanthate is used primarily in hormone replacement therapy (HRT) for postmenopausal women to alleviate symptoms of estrogen deficiency and maintain hormonal balance. Additionally, it may be employed in certain contraceptive regimens as an injectable form of hormonal birth control.