Used primarily as an estrogenic agent in veterinary medicine, particularly for growth promotion in livestock. It functions by mimicking natural estrogen, supporting increased weight gain and feed efficiency in animals. Due to its long-acting nature, it was favored in implant formulations for cattle. Its use has declined in many regions because of concerns over hormonal residues in food products and potential environmental impact. Also historically investigated for use in hormone replacement therapy, but largely discontinued for human use.