Ethinyl estradiol and ethynodiol diacetate contains a combination of female hormones that prevent ovulation (the release of an egg from an ovary). This medication also causes changes in your cervical mucus and uterine lining, making it harder for sperm to reach the uterus and harder for a fertilized egg to attach to the uterus.

Ethinyl estradiol and ethynodiol diacetate are used as contraception to prevent pregnancy.

Ethinyl estradiol and ethynodiol diacetate may also be used for other purposes as determined your doctor.