Estrogen is a hormone found in all folks. However, people with vulvas produce more of this hormone and is also called sex hormone. There are 3 types of estrogen that have different functions in different stages of life. Estrogen most commonly is responsible for the function of the reproductive – development of breasts, regulation of uterine lining and mucus, maintaining the thickness of the vaginal wall and helps stimulate the growth of egg follicle are some of the functions of estrogen . Estrogen is also responsible for bone health and cardiovascular system
Sources:
https://www.medicalnewstoday.com/articles/277177
https://www.hopkinsmedicine.org/health/conditions-and-diseases/estrogens-effects-on-the-female-body
https://www.webmd.com/women/guide/normal-testosterone-and-estrogen-levels-in-women
https://www.ncbi.nlm.nih.gov/books/NBK538260/
https://www.healthline.com/health/womens-health/low-estrogen-symptoms
https://my.clevelandclinic.org/health/articles/16979-estrogen--hormones