Oestrogen (or estrogen) is a group of female hormones. It includes oestrone (E1), oestradiol (E2), and oestriol (E3). Oestradiol is the most important oestrogen. Oestrogen is mainly secreted by the ovary, a small amount by the liver, adrenal cortex, and breast. In pregnancy, the placenta can also have a lot of secretion. Male testes also secrete a small amount. Ovary mainly secretes β-estradiol, other estrogens are less important.
References[change | change source]
- The word comes from the Greek οἶστρος, meaning gadfly. Its use here is not literal.
- Whitehead S.A. & Nussey S. 2001. Endocrinology: an integrated approach. Oxford: BIOS. ISBN 1-85996-252-1