In biology and medicine, feminization is the development in an organism of physical characteristics that are usually unique to the females of the species.
Feminization can also be induced by environmental factors, and this phenomenon has been observed in several animal species.
[1][2] In the case of transgender hormone therapy, it is intentionally induced artificially.
In animals, when feminization occurs in a male, or at an inappropriate developmental age, it is often due to a genetic or acquired disorder of the endocrine system.
and feminizing effects (gynecomastia) since androgens can be converted to estrogens by aromatase in the peripheral tissues.