Estrogen and androgen belong to the same gonadal hormones. The relationship between estrogen and androgen is mainly as follows: i. Estrogen is mainly secreted by the ovaries, which can promote the development of female reproductive organs and maintain female secondary sexual characteristics. Second, androgens are mainly secreted by the testes, which promote the development of male reproductive organs and maintain male secondary sexual characteristics. Third, androgens are mainly in men’s bodies and also contain a certain amount of estrogen, while estrogen is mainly in women’s bodies and a small amount of androgen is also present. In addition to the male and female gonads that can synthesize sex hormones, the adrenal cortex reticular zone, can also synthesize small amounts of estrogen and androgen. The androgens synthesized by the adrenal cortex reticular formation are the main source of androgens in women, and small amounts of estrogens can also be synthesized from fat.