estrogen

https://doi.org/10.1351/goldbook.10680

Any substance, natural or synthetic, that exerts the hormonal effects of the natural estrogen, estradiol, usually by interaction with the estrogen receptor.

Note: Phytoestrogens are substances that occur in plants and have estrogenic activity.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 751 [Terms] [Paper]