estrogen A group of female sex steroid hormones in vertebrates produced in the ovary; the principal ones include B-estradiol, estrone, and estriol.

• 雌激素在脊椎动物的一群雌性的性别类固醇荷尔蒙，生产于卵巢中；主要包括B雌二醇，雌素酮与雌素三醇。