The two main female sex hormones are estrogen and progesterone . Although testosterone is considered a male hormone, females also produce and use a small amount. Female sex hormones , often known as sex steroids, are essential for sexual development, reproduction, and overall health. Sex hormone levels fluctuate over time, but the most noticeable variations occur during puberty, pregnancy, and menopause. Sex hormones are responsible for both the male and female gonadal development as well as the regulation of the sexual cycle, sperm production, and the menstrual cycle. Although each sex hormone is identified with specific sex, but are found in both women and men. Estrogen is the most well known female sex hormone. According to the National Women’s Health Resources Center, this sex hormone is produced in the adrenal glands, ovaries and fatty tissue.