What is Estriol?

Estriol is a white crystalline powder with a molecular formula of C ₁₈ H ₂₄ O ₃ , a molecular weight of 288.38100, a density of 1.255 g / cm 3, a melting point of 280-282 ° C (lit.), and a boiling point of 469ºC at 760 mmHg.

Estriol has relatively low estrogen activity, and has obvious effects on the blood vessels, the hypothalamic-pituitary-gonadal feedback system and the hematopoietic system. It can selectively affect the distal part of the female reproductive tract and the male breast, testes, and prostate. Commonly used for leukopenia, various menstrual diseases and women's menopause syndrome. It is characterized by selective effects on the vagina and cervical canal, but has no effect on the uterine body and endometrium. In addition, it has the effect of increasing peripheral leukocytes, and can also reduce the permeability and fragility of blood vessels. ^[2]