Ethinyl Estradiol is a synthetic form of the hormone estrogen, commonly used in various hormonal contraceptives. It helps regulate the menstrual cycle and is often combined with a progestin to prevent ovulation, making it effective for birth control. In addition to contraception, Ethinyl Estradiol is also used to treat certain medical conditions, such as hormonal imbalances and symptoms of menopause. It is available in various forms, including pills, patches, and rings, allowing for flexible options for users.