The female sex hormone is :

Explanation

Estrogen is a hormone produced in females by the cells of the theca interna of Graafian follicles in the ovary, from puberty up to the age of menopause (about 45 to 55 years). The main estrogen is estradiol, which is called the female development hormone because it helps in the development of secondary sexual characters (including proper development of breasts, mammary glands, uterus, vagina, etc.) in females. VIII. Reproduction and Embryo Development